ASTRONOMISCHE NACHRICHTEN. N! 3047-48.

Double Star Obserrat'ions made in 1890 with the 36inch Equatorial of the Lick Observatory. By S. 1V. Burn/znnz.

'The double star observations which follow, represent ias proved as serviceable here as elsewhere. It is certainly the principal portion of my work in this direction during :he best arrangement ever invented for use with either ;I the year 1890. Substantially all the work was done be- arge or a small telescope. It would be almost impossible tween April I and December I. On two nights of the :o get along without it in doing this class of work with week the large telescope hds been used by me for micro. .he large equatorial. When the drivingclock is attached, metrical work, when the weather on these nights has been :he movement of the eyepiece, which is nearly thirty feet favorable. A few measures have been made at other times kom the cencre of motion, is so rapid, that it is necessary, with the 12 inch, but nearly all of the measures given :very two or three minutes in some positions of the in- here were made with the great telescope. The character strument, to raise or lower the seat in order to have the of the objects selected for re-measurement was such that Dbserver in a comfortable and convenient position in using it was very desirable to. attain all the accuracy possible the micrometer, and any but a simple device of this kind by employing the more powerful instrument, and many of would be impracticable. the stars could not be seen at all with the other. Most The 12 inch refractor is provided with similar acces- of the ww stars found from time to time, including some sories which work in an equally satisfactory manner. It of those which were discovered with the 12 inch, are much only remains to be said in this connection that any errors too close or unequal for satisfactory measurement with or shortcomings which may appear in the observations that instrument. The large telescope leaves nothing to be following, must be charged entirely to the observer, and desired in this or any other class of micrometrical work. not to the instruments with which the work was done. 'I'he definition of the object-glass, like that of most, if not The methods of observation are the same as here- all, of the telescopes made by Clark & Sons, is practically tofore. With few exceptions each star has been measured perfect with proper atmospheric conditions. The driving on at least three nights. The angles are usually from four clock by Warner Sr Swasey has worked perfectly from or five settings of the wires, with three readings for di- first to last, without a single failure at any time, and is stance on each side of the fixed wire. There appears to probably as fine a piece of mechanism of its kind as can be nothing gained by taking any more readings on a single be found anywhere. night. The micrometer by Fauth Sr Co. is most complete In the selection of stars for re-observation, I hat-e and satisfactory, and with the method employed for illumi- endeavored to take such pairs as could not, or would no:, nating the wires, any object, however faint and difficult, be observed elsewhere, leaving the old binaries and other can be measured. I am satisfied that there is no plan in easy pairs, to be looked after by other observers. Nearly use for' illuminating the lines and controlling their bright- all of the most interesting physical systems, and especially ness so unobjectionable in every respect as the one applied those in rapid motion, are difficult objects to measure, and to this micrometer. A description and cut of the 12 inch many of them beyond the reach of any but the most micrometer, of which the large micrometer is a copy in powerful telescopes. These are largely of recent discovery, all essential details, will be found in the introduction to and of which few measures have been made. Stars of this my observations with the Chicago refractor in I 8 79- 80 class have been kept on the workinglist, and as far as (hfemoirs of the R. A.S. XLVII. I 7 I). The light is furnished possible will be measured every year. Another class of by a small oil lamp as in the original device, and after stars, principally from my own catalogues, with every in- some experiments with electric lighting, I am convinced dication so far as the distance is concerned, of physical that the oil lamp is far less trouble to use, and superior relation, have been measured previous to this time only to the other method. There is nothing to get out of once; and these have received some attention, with the order, and the sole attention required 'is to occasionally fill result of finding some in apparently ,rapid motion. I hare the lamp with sperm oil to which has been added about also looked up a good many stars of doubtful duplicity, twenty per cent of kerosene. and the results, negative and otherwise, will be found in The observing chair, with its simple sliding seat, the measures. As a rule observations pf this kind, when designed by Professor Hough (Monthly Notices, March, I 881) the stars were not seen double, are only noted when the Bd. 147 23 371 3047 372 conditions were sufficiently favorable to warrant the positive saving any where the distances of equal stars are not statements made regarding the probable duplicity. Negative decidedly under 2". Nearly all the pairs in rapid motion results-with the large telescope, as with any other, are of are less than I". A new class of doubles, unknown in the little. value except when obtained on first class nights; and, older catalogues, consisting of bright naked-eye stars, with therefore, when froin the lack of good definition, or from very small companions at distances varying from oY8 to z", other unfavorable conditions, it was doubtful whether a has been added within a few years. Down to the com- slight elongation could be seen, I have made no note of mencement of work with the 36 inch telescope, nearly all the observation. The measures and discoveries will show the exaniples of this class were discovered with the Chicago how far it is probable that any pair seen elsewhere would 18 inch. A few were found by the Clarks, and some be missed here. of these have already been shown to be of the most in- The catalogue of new stars contains 70 pairs, of teresting character, for instance z Cygni, 99 Herculis, which number 39 have distances less than I", with an 95 Ceti, etc. It is not improbable some very short periods average distance of 0:'45. Of the latter number 25 are will be found in this class of stars Some interesting sy- less than oY5, the average distance being 0733. The new stems may be expected when the stars of this class disco- stars cover a wide range of magnitudes, some of the vered here are re-measured in the future. closest of them being-near the limits of the Durchmusterung. If my purpose had been to make an imposing cata- The following naked eye stars are included in the list of logue of discoveries by finding as many new pairs as new stars: possible without reference to their character, the number R.4.C. 230 5 Camelop. in my lists down to this time could easily have been made Ceti 199 Y Geminorum many times larger, without exceeding the Struve limits of 95 Piscium 36 Geminoruni magnitudes and distance ; but at this time there would Persei 65 Geminorum seem to be no good reason for encumbering a double star 48 Cephei (H) t Herculis catalogue with that kind of material. We know now that 34 Persei 24 Aquarii they can have no interest as double stars in the proper B.A.C. 1142 ~1 Aquarii sense of the term. With the large telescope pairs of 5" Tauri 248 or 6" distance in the lower magnitudes of the Durch- The following pairs previously known have been musterung can be found by the score on any night, even when the seeing is too poor for ordinary micrometrical found to be more closely double : work; and with the 12 inch it would be easy to make a H 1981 2 2476 I large list in a comparatively short time. I have not allowed s 409 425 ax ~ myself to find new pairs of the kind recorded here, any 2 So9 s 12, .4pp. I1 faster than they could be thoroughly measured. It may be 0s (AIPP.) 77 i many years before some of these are re-observed, and it These are all sufficiently difficult to account for their j is desirable to have a careful set of measures at this time having been overlooked heretofore. j with which to compare future observations. While no rule, unless it is a very general one, can ' At the end of the double star observations will be be laid down for the limits of distance in noting new pairs, ~ found a few new nebulae which have been incidentally it is cert'ainly true that so far as stars are concerned which ' found in the course of the other work. will probably prove to be binary, it is hardly worth while I All places, as in my previous catalogues, are for 1880.

Seventeenth Catalogue of new double stars.

1890.725 i 8907 i 1:65 ~ 8.5, 11.5 36 1890.802 , 91P1 1 0:'45 ~ 8.6, 9 36 ,824 86.7 , 0.46 i 9 , 9.5 .i,47 90.7 , 1.68 1 8.3, 11.51 36 .760 90.1 1.64 8.5, 11.0 36 ,840 93.4 ~ 0.41 i S.6, 9.5 :: I i 1 1 1890.74 90.2 1.66 8.4, 11.3 ~ OO.A i 0.d~I 8.7. 0.: 1 1 I I I 1800.82 , -1 .. , .I ," , This is 8.0 mag. in DM. Discovered with the 12 inch. B I I 56. DM. +63048. Much easier than the preceding pair, which is in theL RA. 0~x9~58~Decl. +63O 46'. same vicinity. B 1158. Lal. 718. 1890.725 I 0.52 9.5, 9.6 1 36 .74i i o.5i 9.0, 9.1 36 R .4 0~~4~55'Decl. - xo0 45'. .760 i z:;30.2 I 0.48 9.0, 9.2 36 B and C. 1890.74 1 31.9 I O.52 1 9.2, 9.3 I I 890.898 138.6 1 0.20 ' 8.8, 8.8 I 36 This pair, and the one next following, were found ,900 135.4 I 0.29 8.5, 8.5 36

140.4 0.28 8.5, 8.5 ~ 36 during an examination of the place given by d'Arrest for .939 _- -I i Tycho Brahe's star. That is a little sp this star. I 890.9 I 138.1 , 0.26 1 8.6, 8.6 1 373 304; 374

A and HC. (H 19S1). ,4 1163 Ceti 195 RA. 1~18~1S~Decl - j" 32 rSqo.898 ' 86?6 1 79y22 I 5.j, - ' 36 ,933 86.4 1 79.3' I 7.3, - 36 1890675 I 195'1 o"17 I 6 , 6 I 36 ,939 ' 86.7 ,79.41 - 36 _. . , - - 7.8. .681 1945 o 15 6 , 65 36 1890.91 , 86.6 1 79.31 -- - , 689 I 187 2- 0.24 6 , 6 36 The wide pair constitutes the double star, H 1981. 180068 I 1923 0.19 I 6 , 62 l'he R.4. in Herschel is I"' too large. He gave the angle 8408, and the estimated distance 60", and the magnitudes I 164. 9j Piscium. 8 and 9. The magnitude of the companion in SD. is 8". KA. ih2 1~26~Decl. +4' 44'. The different magnitudes given to the principal star cover iSgo.Son ! 167.0 i 0.42 7 , 7.5 36 a wide range. Lalande and Schjellerup 8 ; Gould 7.5 ; ,824 ! 168.7 0.39 ' 6.5, 6.8 36 Schonfeld 7.2; Heis 6.7 ; and my own estimate in the first observation which made it still brighter. It is not ,832 ~ 169.4 0.35 6.5 I 7 --36 known as a variable star, but it seems hardly possible 1S9o:Sz -i -168.4 0.39 1 6.7, 7.0 that the magnitudes could differ so much if there is really In the B.A.C. this is 95 Piscium, 7". The mag- no change in brightness. It would be well for variable iitude in the DM. is 8.0. and in Ross 7.3. star obserb-ers to give it a little attention. The new pair is a difficult object, and likely to prove fi 116j. W, ~'tj~o. an interesting one. RA. I 24"'5 1' Decl. +40° z 7'

B 115~.DM. +39014S. 1890.807 61.4 , 2.02 8.3, 12 ! 12 R.4. oh32'"2S' Decl. +40° 1'. .8~9 68.1 I 1.69 I 8 , 12 IZ ,835 ' 5 7.0 1 1.90 ' 8.j, 12 IZ 1890.681 1 37.2 ' 0.25 10, 10.2 36 .85-4 ~ 63.2 I 1.66 8.8,12.5 12 .687 43.4 0.29 9.3, 9.5 36 - ~ ~~ . ~ ~- 1890.83 62.4 I.S~ S.4, 12.1 I ,689 44.6 0.16 ~ 9.8, -.10 36 1~9o.bS i1.7 0.23 9.7, 9.9 Found and measured with the 12 inch. It is a diffi- This unusually minute and difficult pair is involved :ult pair with that instrument. in the extreme preceding end of the Great Nebula in B I 166. Lal. 2980. Andromeda. The magnitude is S.9 in DM. It is difficult enough to test the powers of even the 36 inch; 2nd pro- R.4. lh3I'"45' Decl. +37" 53'.

bably no other telescope will show it well. 1890.807 ' 346.7 ' 2.64 8.3, 11 IZ 329 343.7 2.43 8.5,11.5,12 ,4 1160. B.A.C. 230. .s;5 I 347.1 2.s1 , 8.3, I2 , 12 RA. oh 43"'24' Decl. -14' 13'. 1S901Sz 34j.S. , 2.63 8.4, 11.5,

1890.675 , 114.2 1.39 6 , 13 36 Discovered with the 12 inch. .689 112.4 ' I.TS 5.5, I 1.5 , 36 ,709 112.7 1.01 6 , 11.5 36 F 1167. 1'4, 1~716 1S90.69 113.1 1.19 5.8, 12.0 RA. 1~33~16'Decl. +;So 7'

l'he magnitude in Gould is 5.9. 1890Soj 565 I 16 95, II 12 .Sz9 566 1.29 9.2, 10.5 IT 0 1161. Lal. 1766. RA. ohgj"50' Decl. +51" 9'.

1890.689 324.2 1 0.53 ~ 6.8, 7.5 36 Discovered and measured with the 12 inch. The ,709 323.0 0.45 1 7 I 7.5 ' 36 magnitude in DM. is 8.8.

,725- ~ ' 325.5... 1 ."45 i 7-~ ! 8 I 36

1890.71 ~ 324.2 0.48 1 6.9, 7.7 1168. Schj. 534. RA. 1~43~48~Decl. -10' jS'. B 1162. DM. +35?215. 1890.675 202.5 0.32 8 , S.2 j 36 K.A. Ih3"52" Decl. +35" 18'. ,681 1 204.0 I 0.31 .8 , 8.7 36 I' .689 202.5 I 0.36 8.3, 8.5 I 36 1Sg0.675 j 142.2 ~ 0.31 I 8.8, 9 1 ,681 ' 138.2 0.36 j 9.3, 9.4 .785 203.2 I 0.30 1 7.5, 8 36 1 iz __ ___._~.~- -- 1 __ ,689 , 140.5 0 36 I 9.5, 9.7 1 36 1800.j1 I 203.0 j 0.32 1 8.0, 8.3 I 189068 140; , 0.34 ~ 9.2, 9.4 This close pair is 1~44~preceding, and 2:4 south lhis close pair is about 25' nf B Andromedae. of 5 Ceti. '3* 375 304 7 376

3 I 169. DM. +510420. ,8 1173. Arietis 133. RA. 1~44~17~Decl. +51" 46'. RA. zh50mqs Decl. +23O 32'.

1890.835 , 20703 I zY08 1 8.5, 12 ' 12 A fine triple star, but the close pair is very difficult.

,854 , 202.8 1 2-33 ~ 8.5, 12.5 I 12 The principal star (= Lal. 5468 = W, zh1~02) is 61'8 in ,856 209.0 ! 2.18 1 8.5, 12.5 1 12 the DM.

1890.85 ~ 206.4 j 2.20 I 8.5, 12.3 I A and B.

Discovered with the 12 inch I 890.8 7 9 326?0 I O~XI .882 324.8 0.14 B 1170. - 2 I'ersei. ,893 325.5 I 2.13. R.4. zh 9"'39' Decl. +56' 58'. I 890.88 3254 I 0.13 B and C. AB and C. 1850.687 ,760 1890.879 283.7 I 4.54 7.5 I 12 5 36 .7_Sj ,882 , '3 5 36 1890.14 393 __ __ 36 1890.88 283.6 1 4.63 ' - I 13 A and BC. 1x74. Lal. 5683. 1890.687 ~ 353.2 70.35 ~ 6.3, - 36 ,689 353.2 70.48 , 6.2, 11 36 RA zh 57"46' Decl. - 11" 26' ,185 , 353.6 70.33 1 - , - I 36 - 1,I 1890.802 304.9 1.25 7.8, II 1890.74 353.3 i 70.39 1 - - I 1 i 36 ,832 305.7 1.16 1 7.5, 12 36 The companion to the principal star in the great ,840 307.1 1.24 I 7.7, I I 36 .. 1 ~ cluster in Perseus is an exceedingly minute and close pair, 1890.82 305.9 ! 1.22 7.7, 11.3 and of the last degree of difficulty. I do not think an other telescope can possibly show this pair. The distance Discovered with the 12 inch. in the first measure was noted as >too largeu. It resembles the one found in the nebula of Andromeda, but is very B 1175. Lal. 5636. much fainter, and correspondingly more difficult. The only other measures of this distant companion RX. zh57"'47' Decl. +43' 14'. were made with the Chicago refractor: 1890.673 I 282.8 0.25 ~ 7 , 8.5 36

1879.55 352P6 70:'47 B 2 n. ,675 280.0 ~ 0.22 , 7 , 8.5-. 36 ,681 ' 2800 I 0.30 8 , 9 1 36 A still more distant companion makes S 409. -~__ ~~ 189068 2809 j o 26 7 3, 87

,8 1x71. DM. +56P556. I I 76. 48 Cephei (H). RA. zh 12~45' Decl. +56' 18'. RA. 3h 5"9s Decl. +77O 17' 1890.687 ' 23.9 1.11 , 8.5, 13.5i 36 ,689 ' 21.2 1 1.13 i 8.7, 13.5 I 36 A and B.

.760 ~ 19.2 1 0.80 1 8.7, 12.5 I 36- - ~. -. - -~ - 1890.633 36 1S90.71 ~ 21.4 1 1.01 8.6, 13.2 I ,652 :;::f I :::: 36 ,673 276.7 I 1.26 .4nother pair in the great Perseus Cluster; the south - __.. --36 - 1890.65 277.6 1.18 star of two about I' apart. It is 9m2 in DM. 1

A and C. ,8 1172. DM. t560635. RA. 2h2~m26sDecl. +56"42'. 1890.610 228.0 1 10.81 / 5.5, ,633 1 228.0 11.11 ' 5.5, ':3'i i2 1890.687 238.0 I 1.65 I 8.7, 10 ,652 227.8 1 10.94 1 6 , 13.5 1 36 .689 1 237.8 1.65 1 8.6: 11.5 1890.63 I 227.9 I 10.95 17.7, 13.3 I ,760 239.2 1.63 10.5 36 __ 1 8.0 I 1890.71 1 238.3 I 1.64 1 S.4, 10.9 I A fine triple, but not a very easy one. The outside companion was measured twice before the close star was This is also in the borders of the Perseus Cluster. detected. This is B. .4. C. 979. 377 3047 378

,!3 ,!3 1177. Lamont 464. ,!3 1182. Lal. 6759. RA. sh1Zm45' Decl. -lo 28'. R.4. 3h35m28s Decl. +48' 9' A and B 1890.802 t 24% I 0:45 9.3, 9; ~ $

.824 ~ 24.6 ' 0.38 ~ 9 , 1890.610 260~3I 4:56 6 , 13.5 36

.630 ~ 262.1 1 4.24 6.5, 14 5 36 .832 I 25.4 ,i 0.32 I I 36 i I 4.31 I 6.8, 14.5 36 ,633 - ~ 1890.82 1 24.7 1 0.38 1 9.1, 9.1 1 ~~ .--__ 1890.62 I 261.2 1 4.37 6.4, 14 2 Found during one of the niany attempts to see thal most singular double star, 95 Ceti. This new pair is 31I7 f, A and C and 5' 42" s of that star. The magnitude in SD. is 9;3. 1890.610 i 242.9 I 19.56 1 - , 13 36

,630 242.4 1 19.20 - I '3.5 36 ,633 I - I '9.04 - , 14 36 1890.62 wl 19.27 I - , 13.5 The micrometer was disturbed during the evening of 1890.882 347.5 0.90 I 6.5, 12 36 I the last measure, and some of the position-angles were lost. ,890 346.2 ~ 1.11 ' 6.7, 12 36 ,898 I 349.7 I 0.97 1 6.5, 13 36 B 1183. B.A.C. 1142. RA. 3h37m35s Decl. +45O 18'.

1890.610 139.3 1 6.44 1 6 , 14.5 I 36

,660 139.8 ~ 6.19 1 6.5, 14.5 1 36 -673 1 140.5 I 6.82 I 6.5, 15 1 36 6 I 179. 34 Persei. 1890.65 I 139.9 6.48 I 6.3, 14.7 1 RA. 3h20m47s Decl. -1-49' 6'. B 1184. DM. t-210526. 1890.610 162.0 1 0.68 i 6.5, 11 i $ RA. 3h41m14s Decl. +zzo 0'. ,633 161.6 0.76 6 , 11 ,652 I 164 I 0.68 5.5, 1~2~536 1890.785 1 272.9 0.66 8.2, 8.3 1 36

,.660 1 166.0 0.60 ~ 5.5, .S5i 271.8 , 0.61 8.0, 8.5 ______1 36 i I I 36 1890.64 I 163.4 , 0.68 1 5.9, 11.6 1 ,867 I 272.0 1 o.qo I 8.0, 8.2 I 36

1890.83 , 272.3 ~ 0.62 i 8.1, 8.3 1 A more difficult pair than the distance and relative magnitudes would indicate. /3 1185. W, 4h376. RA. 4h 18~52~Decl. +18" 35'. /3 1180. Lal. 6417.

1890.660 ~ ,o.15 ~ 7.6, 8.5 ~ 36 R.4. 3h2Zm23' Decl. -4' 59'. ;;::I ,681 0.16 I 8.0, 8.5 1 36 A and €3. 1890.802 24.7 I 0.42 1 8.5, 9 I 36 ,824 i 24.6 0.46 8.5, 9 36 . 1890.jo ~ 25.6 ~ 0.16 I 7.8, 8.4 I

,832 I 25.2 ~ 0.45 I 8 I 10 I 36 The magnitude in DM. is 7.5

1890.S~ 1 24.8 I 0.44 , 8.3, 9.3 ~ ,9 1186. Tauri 248 = Lal. 8372. RA. 4h 2om5 Decl. +loo 56'. 1890.802 1890.906 185.0 I 0.63 1 6.8, 9.5 1 $ .824 ,911 1 180.4 0.61 6.7, 9 .83z ,939 181.0 0.53 1 6.8, 10.5 1 36 - I : 1890.82 1890.92 I 182.1 I 0.59 1 6.8, 9.7 i In Argelander and Heis 6m, and as bright as that (3 1181. Lal. 6685. n most of the catalogues. R.4. 3h32m53s Decl. +45O 31'. B I I 87. 5 Camelopardi. 1890.652 270.5 0.36 8 , 8.1 36 RA. 4h45m~4sDeck +55" 4'. .660 266.9 0.31 8.3, 8.5 1 36 1 12 1 1 12.86 5.5, 1 36 .673 274 2 0.38 8 , 8.3 i 36 1 1890.66 1 270.5 I 0.35 j 8.1, 8.3 I 12.90 , 5.5* '3.5 I 36 Near 02 59. 379 3047 j 80

[I I 188. /? 1191. La]. 12262. RA. ~~44~33'1)ecl. --I' 28'. RA. 6h I 9"9' Decl. + I 8" 50'

A and H. 1890.890 I 163:o ~ 1:'45 I 6.8, 14 30 .939 I 162 3 ' 1.42 , 7.0, 14.j j(p 1800.832 103Po IYOI 7.8, 10.j' 36 ,840 108.4 1 1.29 8 1 10.5 I 36 ,851 106.7 1.38 7.8, 10 I j6 189084 106.0 1.23 j.9, 1-0.3 A difficult pair most of the time

8 1192. IJ Geminorurn. A and C. (= 2809). RA. 6hz~m50sDecl. +20° I;'. 1890.840 98.5 25.38 - I 9 36 and C. ,851 98.1 25.22 -- , 8.5 .~6 B

,862 98.4 25.37 7.8, 8.5 ' 36 1S50.879 341.0 ' 0.14 9.0, 9.2 jh

1890.85 98.3 25.32 - t 8.7 ,882 ~ 349.1 , 0.18 i 8.5, 8.6 , jh .S9o I j48.4 j 0.12 , 8.5, 8.7 ' 56 The new pair is the principtl star of 3 809. The

1890.88 346.2 ' 0.1j ~ 8.; , Struve star appears !o be fixed: 8.S

1831.,16 IOIPZ 25:170 2' 3 n. A and HC. (= 03 App. 77) 25.25 De 4 n. 1868.56 99.6 1890.8;4 329.3 lX2.48 - , - 36 1879.02 98.3 25.22 fi 2 n. 362 329.2 , 112.80 , - , - jh ,879 329.j I112.80 - , - jh p 1189. Schj. 1985, 1890.86 ' 329.3 112.60 - , - Rll. 5" 5 I"'%' Decl. -+oo 23'. This is one of the bright stars with distant com- A and H. panions given in Ox's Catalogue of wide pairs. This companion star is an exceedingly close double, and one 1890.879 267.4 0.23 8 , 9 , j6 , not likely to be found with any niuch smaller telescope. ,890 271.2 0.13 One would expect rapid motion in such a pair. The only ...939 269.8 0.23 other measures of this from the large star are the following: 1890.90 269.5 0.20 1876.02 329P1 112:'54 Ile 3n. AB and C. Evidently there has been no change. If the principal star has any proper motion it is extremely small. The 1890.840 194.5 58.02 large telescope shows a number of faint stars nearer than ,862 194.5 58.21 ~- - - . __.___._ this companion. I have measured most of then;. The 1890.8; ' 194.5 58.1 1 nearest one is quite difficult to measure, but the others are easily seen. The magnitudes of A and I< in the Dill. are 9.0 A and a. and 9.2. DRI. +oP1230, 1229. 1890.862 359.3 22.30 - > Ij 36 6 1190. W, 5'!1269. ,879 I 356.9 22.78 - , 15 36 .8qO- 357.9 , 22.86 I - I '5 36 RA. 5h51m~;s Decl. +oo 1'. ... - - 1890.SS 358.0 , 22.65 - I 15. A and B. A and b 1890.840 ' 341.2 1.25 7 , 10.5, 36 ,851 339.5 1.3; : 7.8, II ' 56 1890.862 13.6 , 53.99 .8;9 , 13.0 , 53.80 ,862 339.; 1.61 7.5, 11 1 36 -. __ __ 1890.85 340.1 1.41 ' 7.4, 10.8, 1890.87 , 13.3 I 53.90 A and c. A and C. 1890862 254.3 57.06 1890.840 95.2 6.j~ - v 13 , 56 ,851 95.2 6.62 , - , 12 36

,862 , 96.0 ~ 6.62 1 - , 12.5 1 36 .- ,65 , -I_ A and d. 1890.8g ~ 95.5 , 12.5 ~

A triple star near the last. The distant companion 1890.862 11.5 ~ 92.22 I - , 12 : 36 is noted in the Harvard Zones, where it is called 17 mag .8;9 ~ 11.7 I 92.04 1 - , 11 I 3b nitude, and distance estiinated 8". 1890.87 1 11.6 ! 92.13 - : 13 1 381 304 7 382

B 1193. 36 Geminorum. B and C.

RA. 6h4zrn5z5 Decl. +21' 56'. I 890.4 2 2 5904 1 o"4 1 - , I2 36 ,458 59.8 I 0.96 ', - , 12.5 36

,890 .460 58.9 0.84 - , 14 ~ 36 59.4 j 0.88 - , 12.8 .~ -. . . -. 1890.45

1890.90 i 355.0 ! 10.81 ~ 5.7, 14.5 I This is one of the principal stars, and near the cen- .4 very small companion. tral portion, of the great Cluster in Hercules. It was the only pair close enough to be called a double star, I could /3 1194. 65 Geminorum. find on this occasion, but the conditions were not specially RA. 7"22m21s Decl. +z8' 10'. favorable. Of course there are many stars within, say, 2. 1890.879 1 289.1 , 13.89 5 , 14 of each other, but in all of the bright compressed clusters 382 289.7 ' 14.06 I 5.5, 14.5 which I have examined with this and other instruments, there seems to be a remarkable absence of real double .890 I 289.8 ~ 13.77 I 6 , 13.5 I 36 stars; and this seems to be true of star clusters generally. 1890.88 , 289.5 ~ '3.91 i 5.5, 14 ~ A faint attendant similar to the last. B 1200. Lal. 31421. 8 1195. Lal. 15331. RA. I 7h I 1~5'Decl. +lqO 49'. RA. jh45"35' Decl. -9" 6'. 1890.422 1 13.5 1.41 8 , 11.5 36 1890.903 81.; 1 0.46 1 7.5, 8 , 36 ,447 12.7 ' 1.52 7.5, 12.5 36 1 1.052 I 80.8 1 0.43 , 7.0, 7.2 36 .458 _--10.5 ~ I33 8 , 12.5 I 36

1.0.;~i 81.8 I 0.49 ~ 7.5, 7.7 36 189044 12.6 1.42 I 7.8, 12.2

1891.00 81.4 ' 0.46 I 7.3, 7.6 This is the preceding of two 8" stars, same deck fi 1196. DM. +60P112;. nation, and 33$ apart. Near a Herculis. RA. ghSrn55I Decl. +59" 57'. /3 1201. A0e. ijzrj. 1890.882 i 63.0 0.44 8.5, 10.5 ~ 36 RA. 17~26~40~Decl. +67O j2'. 1.052 , 61.0 , 0.46 8.5, 10.5 I 36 ___ ~ ~ __~.-

~ ~ 1890.97 62.0 , 0.45 8.5, 10.5 1890463 ~ 339.0 0.43 7 , 1 36

~ This is 63s f a 6'" star, and 40"". The magnitude ,496 337.1 0 39 8 , 8.2 36 in DM. is 9.2. 499 338.4 1 0.48 1 8.3, 8.3 36 119j. Lac. 5791. 1890.49 338.2 0.43 7.8, 7.8 RA. 13~56~~4'Decl. -31' 6'. /3 1202. Dhl. +3"3564. 1890.375 ! 176.3 ~ . 0.94 , 4.5 7.5 i 36 ,436 i 179.4 I 0.97 7 , 8.5 ~ 12 RA. I jh~5~33' Decl. +3O 33.

0.66 8.2 ~ 12 .438 ~ 180.9 I 7 , ~~~ , A and R. 1890.41 ~ 178.9 1 0.86 I 6.8, 8.1 , Discovered wich the 12 inch. 1890.463 1 351.6 o 75 1 8 , 9 ' 36 479 1 3535 0.83 I 8.5, 10 36

/3 1198. t Herculis. 354.1 I t ,496 0.65 8 9 ~ 36 RA. 16~16~8" Decl. +46O 36'. 1890.48 353.1 1 0.74 8.2, 9.3 I 36 36 C and D. 36 1890.463 92.2 3.85 8.7, 11.j) 36 36 1 ,499 93.2 I 3.99 10, 11 36 1890.35 I 325.3 6.57 ' - , '3.9 ,496 94.3 3.89 9.5911.5 36 A very minute companion. 1890.48 93.2 3.9' 9.4, 11.3 ~ /3 1199. Messier 13. RA. 16~37" Qecl. +36'41'. AB and C. A and B. 1890.463 28.2 /104.00 1 - , - 1 36 1890.422 131.9 I 2.64 10.5, 11 36 .473 28.4 , 104.02 1 - , - .458 129.1 1 2.35 11 , 11.5 36 .476

.460 130.0 ~ 2.85 II 11.7 I I , 36 ____,479 589045 I 130.3 I 2 61 I 10.8, 11.4 1890.47 28.2 1103.87 I - , - I 304 7

Not only is the principal star of 2' 2476 :I close double, but there are at least four other stars nearer than 7 9 8.8 I2 the companion. One of these, D, is extremely difficult 8.5, 8.4 36 B to measure. There does not seem to be any change &I .-8.5 I 8.4 36 the distant star : 8.7, 8.5 1830.61 21407 31l41 z. A and C are respectively Lamont 2849 and 2852, but the declination of the latter should be I' more. The ,9 1205. Lal. 38649. magnitudes of these stars in DM. are the same, 8.2. KA. 20"5"46" Decl. -So 27'.

1890.644 ~ 5105 ~ oY51 8 , 9.5 12 B 1203. Serpentis 191. KA. I I 9"'56' Decl. +oo 44' - 1890.652 67.4 0.30 1890.65' I 50.0 ' 0.56 1 8.1, 9.4 1 7 , 7.3 ~ 36 ,675 66.9 0.31 t 8 , 8.2 36 Discovered with the 12 inch. In the SU. this star ,689 I 69.1 0.29 1 7.5, 7.7 .-___ 36 is 7.0 magnitude. 1890.67 I 672 0.30 , 7.5, 7.7 ,9 1206. Lal. 39115. A very close and nearly equal pair. lhis is Lal. 3401 j. RA. 20') 14~~36~Decl. +36" 23'. 1890.518 2.8 I 1.77 I 8 , 10.5 j6 ,9 1204. Aquilae 56. ,523 1.6 2.12 S,II 12 +z0 25'. RA. 19~6"'1' Decl. ,534 1 4.6 I 1.80 , 7.5, 11 jG ~ A and 1%. 1890.52 3.0 i 1.90 7.8, 10.8

1890.556 3.6 0.51 7 , 8 36 , 0 1207. Lal. 39198. ,564 , 4.6 0.44 8 , 8.5 36 1 RA. 2oh 16"'~ j' Decl. t-43' 28' ,573~ 3.3 0.38~- ' 8 9 36 - .. . 1870.573 217.7 ' 5.74 7.5, 13 36 1890.56 3.8 ' 0.44 ~ 7.7 , 8.5 , I ,575 , 217.1 5.79 8 , 13.5 36

11 and C. ,592 1 ~ 218.7- ~~~ ! 5:75 , 7.5 > 14 36 1890.58 217.8 , 5.76 7.7, 13.5 1890.553 1 175.0 12.42 ,556 i 195.6 12.92 One of the Wolf-Rayet stars in Cygnus. Perfectly ,573 194.9 '3.11 round and sharp with the highest powers. 13.10 - .6 I0 12!:5--p- ,9 1208. Lal. 39656. 1890.57 ~ 195.0 12.89 RA. 20''28~38~Decl. +6O 28'. A and D 1890.537 , 335.4 , 2.77 5.3 12 36 1 3.00 ' I 890.5 56 159.9 20.80 - , 14.5 36 ,556 336.3 7.5 12 36 1 .6 10 I 60.2 21.54 ' - 7 14.5 -~.564 334.8 3.04 ' 7.5, 12.5 36 I 36 __ 1890.55 335.5 2.94 7.4, 12.2 __ ,675 '59.6 __21.35. I - 7 '5.5 36 ' 1890.61 '59.9 21.23 - t 14.8 ,9 I 209. SD. - 1j06025. A and E. KA. 20~34~9'Decl. -I 7" 48'. 1890.556 3'6.9 26.38 36 1890.649 ' 293.8 0.51 9 , 10.5 36 3 I 8.0 26.23 ,652 . 291.4 0.43 ! 9 , 10 36 ___-,594 __ - - ~- 36- I 1890.57 3'7.4 26.30 ,673 , 297.7~ -' -_014!- l--9~ 9.3 , 36 1890.66 , 294.3 1 0.45 I 9 , 9.9 , A and F. Discovered with the I 2 inch. It is 2214 preceding, 1890.553 292.8 27.89 36 and 0:4 south of the 7" star, E.A.C. 7151. .556 292.4 27.72 36 1210. Pi. zoh440. ,594 292.3 27.69 3 6. ,9 1890.57 RA. 20~56~6~Decl. +48O 13'. A and B. A and G. (= 32476). 1890.613 ~ 120.5 1 2.16 I 7.5, 13 36

~ 36 ,630 118.4 2.35 ~ 7.6, 12 i 36 36 ,633 1 120.8 1 2.38 , 7.7, 12 I 36 1890.55 1 213.8 1 31.36 I 7.1, 10.2 1890.63 I 119.9 I 2.30 1 7.6, 12.3 I 385 3048 386

C and D. (= 0x425).

4:17 11 , 11.5 36 I 890.675 36 4.17 10.5, 11 36 ,678 36 36 4.49 I 10.8, 11.1 36 - .-- .709 -_ ... -~ - -. -- 1890.69 1890.63 I 134.2 4.28 110.8,11.2 I found this triple with the Chicago refractor in 1884, .4 and C ut it has not been given in any of my previous lists of ew pairs. 1890.613 I 28.6 B 1214. Dhl. +3304387. ,630 I 28.8 R.4. 21~51~23~Decl. +33"45'. A33 1 28.4 __ - -. ___ -- - - 1890.63 I 28.6 A and B. 1890 633 The new star, B, is iiiuch nearer the principal star .652 204.3 than those which constitute 02 425. The distance of D ,673 204.8 1 1.40 has never been measured directly before. gives the ____-.___- -. Og 1890.65 205.0 I 1.39 distance of CD, derived from the angles, in connection with the measures of AC, as 4:11 (1851.7). There has C and D. probably been no change in these stars unless the distance of C has increased. The following are all the measures: I 890.633 10.5, 11 .652 9.5, 10.8 12:33 3n. 1847.49 2706 02 .6 73 9.3, 10.5 1867.00 29.9 12.72 De 3 n. -. ... - __ 1S00.65 245.8 i 5.06 9.8, 10.6

A and C. /3 121 I. Lal. 40744. 1890633 184 Ilrz.16 _- R.4. 2oh 57"15' Decl. - 18"35'. ,652 ISI 1112 55 __ 0.65 j 8 , 8.3 g6 _- 1890 644 1 343 S --.613-_--- 185 I 112.58__- ,649 I 3456 0.58 1 7.5, 8 1 36 1890.65 183 I 112.43 _- .652 3446 0.50 I 7 , 8 , 36 - ~ __~~ .- - 'l'his quadruple star was noted by me in 1884, but 189065 I 3445 0.58 I 7.5, 8.1 1 s not included in any of my previous catalogues. There s a faint star about 20" from C in the direction of The following of a small triangle ; discovered witt 285"; ind a 5" pair of faint stars between AR and CD. A good the 12 inch nany smaller stars in the field. C is No. 4388 of the DM.; ly 1212. 24 Aquarii. nagnitude 9.3. RA. 21~33~~~0~Decl. -0~36'. (3 1215. SD. -IIE~;SI. RA. zzh6"'46' Decl. -I 1'46'.

1890.725 ~ 256.5 0.44 I 6.8, 7.5 I 36 189o.So2 S9.j I 1.58 I 9 , 9 1 36 ,760 ~ 254.9 I 0.45 I 6.5, 6.7 I 36 ' .824 ' 90.0 1.53 9 9.1 ,777 252.0 0.45 6.2, 6.5 36 I i , ____~_.1 1 I j __ 189c.75 1 254.5 1 0.45 1 6.5, 6.9 I ,840- I -9".9-!.1:49j 9 1 9 I -3636 1890.82 I 90.2 I 1.53 1 9 , 9 I A fine moderately close pair, and it is safe to sa! Near the last pair ; discovered with the I 2 inch at the outset that it will prove to be a binary. The prope: motion of this star is or215 in the direction of 8175, an( ,!? ,!? 1216. Lal. 43605. it is evident that it is common to both stars. KA. ~zh~4"'4x'Decl. +28" 55'. 1890.496 1 318.6 1 0.65 1 8.3, 8.5 I 36 ly 1213. DM. +121'4710. ,518 316.1 0.68 8.5 36

,526 ~ 318.5 ~ 8.5: 25 36 RA. 21~48~26'Decl. +13" 0' 1 0.60 I 1890.51 I 317.5 I 0.64 1 8.4, 8.7 I -4 and B. I found this pair Sept. 3, 1885 with the 16 inch I 890.675 258.7 62.21 1 8 , - 36 refractor of the Warner Observatory during an evening .678 258.9 1 62.40 8 , - 36 spent with Dr. Swift at that place. Recently the slip of .709 258.8 I 62.25 I 8 , - 2 paper containing a memorandum of the place of the star I 890.69 258.8 1 62.29 I 8 , - was found, and it is now measured for the first time. 0d 127 24 387 3048 ;SS

6 1217. La1.43635. iiderable increase in the angle as well as in the distance. R.4. 2zh I j"'33' Decl. +30° 42'. I'he mean result given above includes only the nieasures If 1890. The micrometer was disturbed during the night 1890.400 1 216P8 I 0:'68 I 7.3, 9.5 36 In which the last measure but one was made, and the

,518 1221.6 0.65 ~ 7.5, 10 36 position-angle was, therefore, lost. .544 1 218.3 0.50 7.j, 11.5 36 'I'his star has remained absolutely lixed with reference

1890.53 i z18.c) 1 0.61 1 7.4, 10.31 to p' since the measures by Struve. The large star has a considerable proper motion, given as 0:'350 annually in 'I'his pair has proved exceedingly troublesome to the direction of 89"8, and this is evidently common to measure. On several occasions when the seeing appeared both stars. It is not unlikely that this will prove to be a to be excellent there was not the least trace of the com- triple system of the class of which p Herculis and ,u Bootis ])anion. The magnitude^in 1)M. is 7.0. are familiar examples, with the close pair in rapid orbital motion. It is probably a difhcult object at all times, or it would have been detected by some of the many obser- R:Z vers who have measured the wide pair. In 1880 I made a set of nieasiires with the Chicago 18.5 inch, but saw 18~0.523 I2 nothing of the close pair. ,526 36 .534 36 .- $ 1221. DM. +41?4786. 18~)0.52 KA. ~3~22~12~Decl. +41"46'. Discovered with the 12 inch 1890.496 I 14507 1-93 9.5, 10.5 36

499 ~ 144.7 1.91 ~ 9.5, 10.5 ~ 36

$ 1219. SD. -11@5931. - .jIS 1 145.2~ .- 1.89 I 5,- I -10.j 1-36, R.4. ~z~42"'27~Deci. -I 42'. 1890.50 1 145.2 1 1.91 I 9.3, 10.5 Discovered by me at the Warner Observatory in 1885 18yo.802 ' 310.0 i 0.56 8.7, 9.2 36 ,824 : 309.3 , 0.5j 88, 5.5 36 on the occasion referred to in the note to No. IZ16 of this list. ~ 340 , 304310.52 f2L ::i--36 1890.82 1 i 8.7, 9.4 307.9 0.54 ,3 IZZZ. D.11. +2P4669. This is a difficult pair, although it was discovered R.4. ~3~22~23~Decl. +zo 54'. with the 12 inch. About 5' np there is a 6" pair. I 890.802 ' 1.23 9.2 I 9.3 I 36 ,824 1 i::: ~ 1.07 i 8.6, 8.7 ~ 36

.840 ~ 1.13 I 9.0, 9.0 I 36 - . '-3?5l. ... __~~-~- 1890.82 37.4 I 1.14 1 8.9, 9.0 I

Discovered with the 12 inch

1890.610 j 96.2 0.20 9.5, q.6 36 ,630 I 109.2 0.25 , 9.0, 9.1 36 1890.802 1 297.0 1.35 I 8 , 11 36 ,660 1 9i.7 0.23 9 7 o __~--. 1 36 ,824 I 298.9 1.34 1 8.5, I I 36 I 1.30 10.5 ,840 299.9 i 7.7, ~ 36

-4 and EC. (212, .4pp. 11). 1889.673 1 311.8 49.27 1 1 , 1 I 3634 .687 311.8 49 25 1 6 1224. La]. 46942. ,689 I 311.8 1 49.48 1 - - 1 36 -~ ~___ RA. ~3~50~52~Decl. +55" 10'. 1889.68 j 311.8 I 49.33 I - , - 1 1890.725 1 200.9 3.98 I found in 1889 that the Herschel-Struve companion -747 1 204.8 I 3.94 I z::: :3?5 1 :6" was a close double star, but was able to get but a single measure that year. It seemed to be much easier the following year, and the difference of the components in magnitude was obvious. The late measures indicate a con- The magnitude of this star in the DM. is 7.5. 389 3045 3 90

Measures of Double Stars.

2 2. H. 1968. K.4. oh~~36' Decl. + 79" 5'. Kh. Oh 21~33~Decl. - I 7" 4 1890.785 I 17301 1 0.27 7 , j 1 36 1890.851 8814 4:'lO 7 , 9.5 1 ;15 302 179 9 0.30 I 6.6, 6.6 ' 36 354 1 86.1 I 4.17 1 7 , 9.3 ,879 1 d.78.3 ~ 0.30 1 6.5, 6.8 ~ 36 ,856 88.3 1 3.75 7.8, 9.5 I IZ 1890.82 177.1 0.29 6.7, 6.8 ,867 1 88.4 , 3.80 1 8 , 10.5 ~ 12 1 1 1 i -.

18co.86 ~ 87,s j 3.98 ~ 7.5, 9.7 1 This pair has been single, or non-measurable for the last thirty years. The angular motion since the last measure The proper motion of this star (Lal. 593) is given of OX in 1858 has been more than 150". It is not a as oY252 in the direction of 92O. If the direction and difficult pair now, and the distance should be steadily in- amount of this motion is correct, the measures of this creasing, with but little change in the angle. The measures pair show that the small star has a proper motion of its indicate a period of about 450 years, with a maximum own of o?18 per annuni in the direction of 19505, nearly .distance of I". at right angles to the motion of the other star. On the other hand, if B is fixed in space, then the correct proper /j' 484. motion of .4 is 0.35 in the direction of 6102. An extended KA. oh3"'3oS Decl. +51" 22'. examination of these motions will be found in a paper by the present writer in Monthly Notices for January, 1891.

Ho. 2 12. 13 Ceti. _- - - ~~ .- ~.

1890.90 ~ 154.6 I 1.91 1 7.7, 11.7 1 KA. ~~29~~3'Uecl. -4O 15' The pnly other measures of this pair are: 1890.785 Cannot see any trace of duplicity 36 in the large star. lried all 1878.66 15603 1?95 zn B powers; seeing fairly good.

B 255. Hough.- with the Chicago- refractor, thoupht- this was KA. otb5'"38' Decl. izj"4j'. n close pair, (90' : 0?3), but I could see nothing of it 1890.862 , 96.; 0.70 7 5, 8 1 i 36 OX 15. -879 I 99.0 ~ 0.53 ~ 7.5 I 9 , 36 RA G~ zo"14~Decl. +48" 22' ,882 1 97.9 i 0.53 1 7.6, S.3 i __~~_____ ' 3.6 1890.87 1 97.9 , 0.59 7.5, 8.4 , 18ao.879 ,881 Probably not much change yet, as De found : _-___ .8gS 121.0 , 0.15 I7.3, 8 36

1875.j6 9900 0:'38 De +n. I 800.88 121.6 0.15 I 7.3 ~ 8.3 ,

This star seems to have been rejected by 05 2s B 393- being really single. Apparently no one but Madler has RA. oh IZ"'IZ~ Decl. -21~48'. ever seen it double. He gave, 9703: 0.35 (1851.7), and noted it as single the following year. It was yerv doubtful 18y0.879 1 18.4 0.70 ~ 7.6, 8 I 36 to De, 1865. I could see no certain elongation with the .893 i 17.5 ~ 0.j3 ~ 7.5, 8 36 12.1 Hanover 9.4 inch in 1874, and found it single with the .898 1 0.71 1 j.5, 8.3 ~ 36 Chicago 18 inch 1879, and had come to the conclusion 1890.89 I 16.0 I 0.71 j.j, 8.1 j that it was not a double star. Even if there has been no Change is uncertain. change, the closeness of the components would account for the failures heretofore to see it double. (See .4. K. 30 I 7). 02' 10 rej. RA. 0~21~16~Decl. +15'22'. B 395. 1890.785 Neither star double. Good seeing. 36 RA. 0~31~9~Decl. -zs0 26'.

1890.802 114.4 ~ 0.77 I 6 , 6.1 36 The smaller star of this wide pair (237" : 96") at I I I 1.4 0.75 6 , 6.2 36 one time was supposed to be a close pair, but it was A24 1 ,832 111.9 0.60 6 , 6 36 rejected by 02 in the catalogue of 1850. Ma in 1844 I j 1 made a measure of it, marked ,very uncertainc. 1 found 1890.82 I 112.6 1 0.74 1 6 , 6.1 it single in 1878 with the 18l/~inch, and at other times. Certainly a binary, but the motion is slow. This Clearly there is no occasion for any further examination of star has a large proper motion, which, according to Arge- this star. ander, is 1!'436 in the direction of 9003. 24* 39 ' 3045 392 491. d Androniedae. -4 and D RA. oh 3~~54'Decl. +30° I 2'. 16902 S2:'80 170.7 82.86 , 12.5 36 170.0 I 82.83

_.__ - In 1884 I examined Polaris with the Chicago refractor, 1890.56 I 299.4 I 28.18 I - , - and measured the places of the nearest stars I could see No change since my first measures with that instrument. The measures, which have never been published, are as follows : 1884.74 8800 43:'28 - , 13 ~n. 1884.74 172.2 82.68 - , 12 in. These are small stars with the 36 inch. There is nothing nearer than the 3 companion.

? 4. R.4. 14"'59' Decl. +1o0 55'

Ho. 2 I 5. 45 -4ndromedae. 0.41 8 , 9 36 R.1. 1~4~26'Decl. +37" 5'. 0.40 I 7.5, 8.5 36 0.42 j 7.5, 8.5 36

1890.630 Not double. 36 0.38 8 , 9 ~ 36 . ,660 .4bsolutely round with powers to 36 0.40 I 7.8, 8.8 i I 500, and fine conditions. Cannot be double. Some of the measures made heretofore are very ,675 Perfectly round. Seeing mag- 36 discordant, and would appear to indicate rapid motion ; nificent. but it is now quite certain that the change is rather slow. Both angle and distance seem to be diminishing. Ho. gave the angle 259?1 (1889.97) I n. There is probably some mistake about this star, as it would be,a very easy pair with this telescope according to the description 6 506. 9 Piscium. in Ho. RX. 1~2jm4' Decl. +14'44', rj.' 1029. 4 Piscium. 1890 j25 j 130 0.95 I -, 11.5 36 1.02 ' - I 10.5 RA. xh7"'z7* Decl. +6' 56' ,777 I 160 , 36 ,840 I4 1 1.01 I - , I1 - ~- __36

B and C. 1850 78 I 14.8 0.99 ~ - , 11 1890.903 H. 2061. .91 I . ,939 RA. 1~30~2~Decl. -]So 8'. 1890.92

A and B. (2100) 1890.94 I 322.4 I 63.05 I 7.5, 9.7 1 1890.911 63.2 I 23.76 This star has a large proper motion, 0:'414 in the .939 I 63.9 I 23.65 - I 36 direction of 116P5. There are no other measures of the 1890.92 1 63.5 1 23.70 1 - , - I companion with which to compare these. Herschel gave the angle 326P7, and estimated distance 30". Evidently There does not seem to be any change in the small there would be but little change in the angle. star since my measures in 1888. B 736. Polaris. RA. 1~39~38'Decl. +38" 20'. R.4. 14~46~Decl. +88" 40'. A and B. A and C. 1890.898 209.4 36 36 ,900 1 208.3 36 36 .9II 210.2 -36- 1890.90 1 209.3 393 3 94

A and. C. (Z157) fl 513. 48 Cassiopeiae. RA. 1~52~7'Decl. +lo" 19' ~890.898 11606 12763 - , 8.6 36 ,900 115.6 12.59 36 --___.9I I .___.--115.5 1 12.46 1 ::i--b 36 I 890.90 115.9 I 12.56 1 - , 8.7 1 36 36 There is no change in the wide pair since tht 1890.62 j 308.6 - , - measures of .2 in 1832. The close pair was discoverec 1 0.55 I with the 6 inch on Mt. Hamilton in 1879. These are tht This will soon be a very difficult object. The change only other measmes : will be principally in distance, and in a few years it will 1879.94 20900 oY86 B 3n probably be out of the reach of the large telescope. The measures down to this time indicate a period of a little less than 40 years. B 1016. RA. 1~42~52'Decl. +3z0 29'. 03 38. y Andromedae. RA. 1~56~32'Decl. +4ro 45'. r890.898 1 n; I 0.59 1 8.5, 8.5 ,900 0.56 8.5, 8.5 ,"6" B and C. .911 I 28.4 I 0.63 ~ 8.5, 8.5 I 36 1890.526 Elongation doubtful with 1900. 36 I8gO.90 i 27.8 ! 0.59 1 8.5, 8.5 1 Distance much less than o:~. -573 Seeins to be slightly elongated in 36 There are no other measures of this pair. 30406. Distance decidedly less than OYI. .594 Elongation, if any, too uncertain 36 Ho. -. to measure with the highest power. R.4. 1"44'n32s Decl. +24'4'. .660 Tried with all powers, and the 36 elongatiop, if any, is so slight that any measure would have no value. Seeing magnificent, and the star - nearly in the zenith. 1890.92 I 177.5 1 0.37 I 7.5 t 7.7 I It will probably be several years before this pair Discovered by Hough. From Gould's Journal, No. 2 I 5. separates sufficiently to be fairly ineasurable with the largest instruments. When the distance is not less than 0:'15, a set of measures can be made which will give the period B 5'2. with general accuracy, when taken in connection with the RA. 1~47~12~Decl. +18O 42'. Ad measures. Hastings. RA. ~~~0~3'Decl. -18~47'. ,610 I 21.5 1 1.64 1 9 , 11.5 j 36 1890.939 342.3 ~ 8 , 8.2 36 1890.58 1 23.8 1 1.64 I 8.6, 11.7 1 ,955 1 341.6 z::; 1 8 , 8.3 36 This star is the distant companion to y Arietis, .974 340.3 i I , 8.4 -36 measured by Sh. 'The only other measures of this pair are: 1890.95 1 341.4 1 2.21 I 8 , 8.3

1878.01 27P3 1745 /3 2 n. The change in this pair is clearly the result of proper notion, but this does not correspond to the proper motion jerived from the meridian observations which is about 3 186. ):)24 in the direction of 186". Considering A as fixed, RA. 1~49~41'Decl. +I' 15'. he apparent motion of B is about O:'I annually in the lirection of 54". These stars are probably similar to the 1890.879 229.4 1 0.33 1 7.5, 7.5 36 :omponents of 61 Cygni, and have each a different proper 0.32 .88z 225.8 6.5, 6.5 I 36 , notion. .Sgo 226.1 1 0.28 - , - I 36 1890.88 1 227.1 I 0.31 I 7.0, 7.0 I Mira Ceti. R.4. ah 13m175 Decl. -3" 31'. The angular motion has been about 160" since 1831. Some of the measures are very discordant. The period cannot be less than 120 years. (Sidereal Messenger, February, 1891). 395 3048 396

I .found this faint star at Chicago. It is between the Algol. variable and Herschel's companion. The only other Rh. 3h0'K.2~sDecl. +40° 30'. measures are: 1890.660 At first a suspicion of a slight 36 18j8.88 90?0 74-70 2 0. elongation with 2600 in a nearly north and south direction, hut too H. 3498. vague to place any reliance on. I(.\. 211 16"'43' Decl. -28O 25'. First class night. oh 15'" S. '1'. 1890.840 No companion of any kind seen. 36 ,687 Star appears symmetrical under 36 Good seeing. all powers. 2jh50"' S. 1'. H gave the magnitudes 7 and 16, and the distance h'one of the stars which have been supl'osed froni I 0''&, with the note, PTripIe ? Excessively difficult c'. The spectroscopic observations, to be close doubles have shown principal star is Lac. j I I. :my evidence of the fact when examined with the large telescope under the most favorable conditions. It is possible B 740. that some other explanation will be found for the recwrent . RA. ~~40"'29'Ijecl. +29' I 1'. phenomenon first discovered by Miss Maury in the Harvnrd 1890.652 Large star certainly not double. 36 spectrum photographs. At a11 events, it is hardly worth .840 Not double. Both stars round. 36 while, until the method has been verified upon some of the numerous known pairs suitdble for this purpose, to As a wide pair this is B 307. Subsequently 1 exa- consume the valuable he of the great telescope in a mined it with the 6 inch, and thought the large star was a further examination of objects of this class. very close double. This is probably not the case.

H. 3535. B 84. KA. zh44''142s Decl. -28' 26'. KA.3h 10~5'Ijecl. -6O 22'.

I 890.832 Not double. 36 18908Sz 1 28co ' oY72 I 6.7, 7.2 36 ,890 30.2 0.66 I 6.5, 6.6 36 'l'his star, H..4.C. 883, Herschel thought was a close 24.7 0.75 7.5 ' pair. I have never been able to see, nor has any one .89; i 7.0, 36 26.2 0.78 7.0, 8.0 , 36 else, so far as I know, except that it was noted as elon- 9P6 ~~ ~ ~ gated by Wilson at Cincinnati. I do not think it can be 1890.89 27.3 0.73 1 6.8: 7.3 , really double. This pair is much easier now than it was wtxn I B 524. 20 Persei. found it with the 6 inch in 1872. It is not certain that RA. 2h 46"'9' Decl. +37" 5 I' there has been much change in the angle.

A and H. 1875.85 1073 oY44 De 5 r,.

1890.594 28705 ~ oY17 5 , 6 36 18j9.39 32.4 0.72 B 5 E. ,610 288.0 0.20 5 , 6 36

.630 ~ 28.7.2 1 0.17 ~ - , - 1 36 A.C. 2. 95 Ceti. 1890.61 281.6 5 , 6 I 0.1s . R.4. 3') I zrni2' Decl. --I' 22'. AH and C. (X 318). 1890.8Sz Nothing seen of the companion. 36 Good seeing. 1890.594 , 237.5 14.07 ~ - .61o 237.1 1 14.06 - .86j Tried all powers with favorable 36 ,630 237.1 i 14.10 - , - 36 conditions, but the small star 1 ' . ____. 1890.61 1 237.2 14.08 , - , 9.2 I could not be seen. ?'he close pair is in rapid motion. The change in This is the most mysterious and strange double star angle is about 50" since 1878. The distance is steadily in the heavens. I have tried it, first and last, perhaps decreasing. hundreds of times with apertures all the way from 6 tC 36 525. 1I.A.C. 920. inches without being able to see any trace of the litt!e

KA. zh 52"'os Drcl. +21O 8'. star. .It the time of its discovery by Alvan Clark with n 7 I/:, inch refrator, the distance was oY7, and the angle was 1890.851 123.2 ~ 0.36 ~ 6.7, 6.8 36 measured by Dawes in 1854. In 1888 1 got two measures .867 120.1 0.31 7.5, ~ 7.5 36 of it with this telescope, but it was very difficult, the di- .879 i 303.2 ~ 0.32 i 7.5, 7.6 36 stance being 0:'45. If the small star is not variable, and 1890.87 122.2 1 0.33 i 7.2, 7.3 I it is not at all probable that it is, it must be in very rapid The distance has certainly diminished since I found motion. I hope to watch it carefully here after. A new this pair in 1875, and the angle seems to be slowly in- pair was found in a low power field with this star, which creasing. It is a binary beyond question. is given in the accompanying list of new stars (8 I 17 7). 397 3048 398

fl 545 is the star used for measuring the parallax R 14 of 02 531, the latter having the same proper motion as 50 Persei. 02 suspected the latter to have a very minute I 890.882 36 companion. The 36 inch failed to show any near attendant. 890 36 There is probably no change in the pair above measured. 36 - 89- 1878.24 31000 I:'OZ 4n. I 890.89 8 The only other measures are: 2 518. 40 Eridani. 1881.06 78@0 I:IO ,!! 2n RA. 4h9m525 Decl. -7O 47'. 1890.681 9905 1 2:'73 - , - I 36 8 536. I KA. 3h39n'8r Decl. +23'49'. ,709 99.0 1 2.80 - , - 36 .760 100.9 2.43 - , - 36 1890.689 1 317.7 0.22 1 8 , 8.5 1 36 ,775 1 100.4 I 2.75 1 - , - 1 36 ' .867 I 325.1 0.14 8 , 8.5 i 36 1890.73 1 100.0 1 2.68 1 - , - 1 .879 1 324.3 1 0.21 1 8 , 8.5 1 36 1S90.81 i 322.4 I 0.19 ~ 8 , 8.5 1 02' 79. 55 l'auri. This is one of the stars in the Pleiades, and is the RA. 4h 13"'~~Decl. +16' 14'. principal star of the wide pair, S 437. It is 1~13%prece- ding .4lcy.one, and 4' jz" north. The change has been 1890.660 1 0.35 I 7 , 8 36 principally in distance, and it is now a difficult pair. The ,673 I ::::1 ::;:I 6 , 7.5 1 36 only other measure is : .675 ! 89.6 6 > 7.5 ~ 36 1878.69 33604 0:'44 B 3x1. ,681 1 86.6 1 0.35 6.5, 7.5 ~ 36 1890.67 1 87.9 1 0.38 6.4, 7.6 1 e 537. Certainly a binary, but the period will be rather long. RA. sh39"~3~ Decl. +24' 28'. The angular movement has been 63O since 1846. 1890.879 I 185.8 I 0.45 1 8.5, 10.5 I 36 ,882 , 186.0 I 0.44 1 8.2, 9.5 1 36 7 I l'auri.

,890 I 182.5 I 0.55 1 8.5, 9.5 ~ 36 -~ R.4. 4h 19~30~Decl. +I 5" 2 1'.

1890.88 ~ 184.8 I 0.48 1 8.4, 9.8 i 1890.681 Certainly not double. 36 This is also in the Pleiades. Probably unchanged. This star was suspected to be a close pair by the 1877.91 18jF9 0:'60 fl 30. observers at Cambridge. 1 have examined it a good many times with various instruments, but never saw anything H. 338. 30 Eridani. juspicious. I do not think it is worth while following this RA. 3h46m475 Decl. -5" 43'. up any longer.

1890.867 Large star certainly single. 36 3 547. De thought the large star elongated in 165~. I RA. 4h~9m48sDecl. -lo 40'. always found it round with the 6 inch, and it is surely single now. la 545. 36 RA 3h59m24s Decl. +37" 42'. 1890.82 1 28.5 1 2.01 I 8.5, 9.7 I 1890.775 310.6 8 , 10.5 36 The change in this pair is due to proper motion ,785 36 :See Observatory, Jan. I 89 I). The apparent annual move- ,802 309.6 8 , I1 36 nent of the small star is 0:(052 in the direction of 137P8. ,824 -36 1890.79 310.1 I 1.09 I 8 , 10.6 2 554. 80 Tauri. ,4 545 and 02- 531. RA. 4hz3m~7sDecl. +15" 23'. 1890.879 Single with all powers. 208.1 235.60 - , - 36 36 1890::,: 208.2 1235.43 1 - , - I 36 It was examined on several other nights with the 1890.7s 1 208.1 1235.51 1 - , - I iame result. 3b 9 3048 400

. j9 sjo. Aldebaran. examined the original record made at the time of the discovery, and there no reason for supposing that an RA: 4h 29m2s Decl. + I 6" I 6'. is error of 180" was made in estimating the angle. If it A and B. was correctly put down, there has been rapid motion in the angle as well as the distance. It is more than pro- 1890.856 108P5 36 bable that it will prove to be a very rapid binary. .862 109.9 36 ,890 108.6 36 - _- De 5. 7 Camelopardi. I 890.87 109.0 RA. 4h47m4~sDecl. + 53" 34' C and D. (fl 1031). A and R.

1890.85 I 278.9 36 1890.775 : z97?9 1 1-05 1 - , 10.5 1 36

.862 2 7 7.5 36 ,777 301.5 1.03 ~ 5.5, 10 1 36 367 281.3 ,785 I 306.8 1.04 1 - , 10 I 36 36 ~ 1 __ __._~-

.882 2 7.8.6 36 1890.77 ! 302.1 ~ 1.04 1 - , 10.2 I I 890.86 279.' Discovered by De in 1864. There is little, if any, change. (32, App. 11). 1865.33 30901 1:'24 Dz 8 n. - 117.36 I - , I2 The distant star which makes 2 610 is relatively 117.19 - , - 12 fixed. 116.98 - , - 36 116.55 - , - p 5 js. /3 Orionis. - 36 - R.A. shSm47' Decl. -8" 20'. 117.02 1 - , The measures show that B has the same proper B and C. motion as Aldebaran ; and also that C has a proper motion 1890.77 j Small star appears to be single 36 of its own of ologg in the direction of 109?6. D appears with all powers. to be moving with C. For a.full examination of the various ,829 Small star absolutely round with 36 measures of these stars and their motions, see paper by all powers. the present writer in Monthly Notices for March 1891. .840 Carefully examined with all powers 36 up to the highest. No indication of duplicity. B 883. RA. 4"44'"33' Decl. +IO" jz'. .S9o Fine seeing. B is round. 36 This star has resisted all recent attempts to resolve A and C or elongate it. It may not be double after all, but should

1891.052 ~ 152.2 ~ 18.22 I 6.8, 13 I 36 be watched for a few years longer. I have looked at this star a number of times without seeing any trace of the close pair, so that there is no @ 190. Orionis 82. doubt of rapid change. The only measures are: RA. 5h 14~38~Decl. -8" a'.

1879.00 17:s 0:'35 ,9 I n A and B. A and B. 1879.00 148.5 18.35 fi I n AB and C. ~ 1890.939 I 359.9 ~ o.jo S , 8.1 36 0.9jj , 359.9 0.61 8 , 8.1 36 552. 1.055 , 355.6 0.52 - , - 36 B ~ 1 -. -~~-

RA. 4h45m3' Decl. +13" 27'. 1890.98 ~ 358.5 1 0.54 1 8 , 8.1 1890.898 1 154.3 1 0.30 1 6.8, 10 36 0.939 160.2 0.39 I 6.8, 10.5 i 36 36 36 This was discovered with the Chicago telescope in 1877. It was not measured, but the distance was estimated The close pair was discovered with the 6 inch in 0.8, and the position-angle 360", the magnitudes being 1874. The B companion is fixed, and there is not much given as 7 and 10. There has been a wonderful change change in the new pair: in the distance, and it is now one of the most difficult pairs I have measured with the large telescope. I have 1876.15 355?3 oy71 De 4 n. 401

8 888. 6 Aurigae. B 752. RA 5h~'6m29sDecl. +37' I 7'. RA. 5h391" L)ecl. -I-47" 46' 1890.660 This star is certainly not double. 36 . 1890.936 16702 6 9 13.5 36 0-939 168.1 1 :':,'1 6 , 13 1 36 . This was suspected to be a wry close pair with the 1.033 166.1 8.46 1 - , 13 36 i inch on Mt. Hamilton in 1879. '890.97 167.1. I 8.60 I 6 , 13.2 I 4 1056. ,u Orionis. There would seem to be a change in the distance. The following are the only other measures : KA. 5h 55"47' Decl. +9' 39'. 1890.775 1 27204 I 17:'01 I 4 , 14 1 36 1880.14 17IPO 7:'91 B 4n. .840 273.1 , 17.17 4 I 75 36 ,974 1 212.5 1 17.15 I - I 13.51 36 2711. 1890.86 i 272.7 I 17.11 I - , 14.2 i RA. 5h 2 1~38'Decl. 1-54' 35'. 1890.838 Fine seeing; nothing seen Qf any 36 8 1058. 4 Geniinoruni. third star. RA. 6h3"13' Decl. +23O 1'. .840 Both stars round. Certainly not 36 double. In r865 De. thought the larger star was double. 1891.01 I 281.3 1 0.28 i 6.3, 6.4 I B 557. Comparing these measures with those of last year, a RA. 5h ~3~16'Decl. +3' 3'. :hange in the distance seems probable. B and C. 1889.13 10403 0:'41 fi 2 n. 1890.882 I 148.5 1 0.38 9 , 9 I 36 fi 1008. 71 Geminorum. ,890 145.7 1 0.35 9 I 9 ' 36 1 RA. 6h7"38s Decl. 2zc 32'. ,939 I 147.8 I 0.35 9 7 9 ! 36 1890.90 I 147.3 I 0.36 1 9 , 9 1

1890.91 1 149.8 1 24.61 1 - , - I HO. 237. RA. 6h35"475 Decl. +3" 22'. There is no change in the 2 pair. The only othei 1890.939 No double star found here. 36 measure of the close pair is: All the stars round. 1878.16 14204 0:'46 2 n. B Ho. describes this as an equal pair of 7mj stars, with a distance of 0:'3. There is certainly no double star fl 1032. G Orionis. in or near this place. All the stars in the vicinity were RA. 5h 3~~43'Decl. -z0 40'. examined. A. G. C. I. Sirius. 1890.785 348.6 0.31 4 , 5 36 ,829 351.6 0.30 - - 36 RA 6h39m53' Decl. - 16" 33'. ,832 1 354.6 I 0.25 1 - 1 - 1 36 I 890.2 5 2 359.6 4.17 - , - 36 1890.81 1 351.6 1 0.29 I - , - I .269 361.6 4.20 - - 36 .304 356.8 4.19 - - 136 The first set of measures gives : 1 ! 1 1890.27 359.7 I 4.19 I - > - I 1888.81 357?0 0:26 B 4 n. 1890 785. The seeing seems to be very good, and although Sirius is perhaps an hour and fi 1007. 126 Tauri. a half from the meridian, apparently the RA. 5h34"22' Decl. +16O 28'. companion should be seen if it can be seen at all this year. 1890.785 Single with 1000. 36 1890.829. Followed it a long time, using various 1 have not tried this star before since I found i powers but could not see anything of the with the 12 inch on Mt. Hamilton in 1881. companion. The seeing is excellent. Bd. 127. 24a 403 3048 404

1890.840.... Followed Sirius for some time under favorable conditions. The companion could not be seen. 1890.939, Fine seeing. Tried all powers; no trace 1890.898 1 150:s 6?46 ~ 8.3, 9.5 36 of the small star. .yo3 , 150.3 6.55 i 8 , 10 , 36 1 am surprised to find that the companion has passed beyond the reach of the large teles,cope. I had supposed that it would be measurable even at the minimum distance if the theory of its movement is substantially correct. It will probably not be seen again for several years. The I'rocyon. meastires given above were made with great difficulty. In consequence of my absence on the eclipse expedition, the R,\. 7h3311115Ijecl. +go 33' measures were delayed two or three months beyond the 1890.785 Carefully examined with various 36 usual time, and Sirius was long past meridian when these powers. Nothing nearer than the observations were made. The present indications are that old companion. the period will probably not be more than 53 years. I have recently compiled n complete list of the measures of the companion down to this time which will be found in B 579. Monthly Notices for April 1891. KA. 7h26"40s Decl. +33'23'

1890.890 ~ 213.7 ' 0.86 ~ 8 , 10 36 B 756. .89S 1 214.3 1 0.83 ~ 7.7, 9.5 ' 36 RX. 6h4~"Decl. +39' 35'. ,903 213.8 1 1.01 ~ 8 , 10.5 36 _.____~.~ ~~

'1890,785 No double found in or near this 36 1890.90 213.9 ~ 0.90 i 7.9, 10 place. The only other measure of this is : This star was suspected to be a close pair with the 6 inch. 1878.24 21901 0:'84 I n. 03 165. 45 Geniinoruni. The principal star with two distant companions make R.1. 7h 1~29'Decl. +16" 9'. 02- 173. The close star was discovered with the 6 inch.

Ig9Q.93CJ ' 5400 3"29 ' 6 , 13 1 36

3.35 6 , 12 ~ 36 2 1143. R.4. 7h4~'n4~SDecl. +5O 42'.

1890.96 , 53.0 ! 3.2j ~ 6 , 12.5 This is one of the missing pairs of 2. As it could The change in this pair is due to proper motion. not be found by Struve himself, it is hardly worth while The apparent motion of B is about O:'I per annum in the attempting to recover it. It is evidently in some other direction of 35SP4. part of the sky. I examined all the stars in this vicinity with the 36 inch, and there is certainly no pair here an- $ 1009. 5 Geminorum. swering Struve's description. R.4. 7h3m30s Decl. +30° 26'.

IgsO.90j ' 177.0 ~ 1.75 4.5, 12.5 36 ,9 IOI. 9 Argus. 0,939 , 180.9 i 1.93 I - , 14 36 RA. 7h46"'135 Decl. -13'35' 0955 173.9 1.51 1 - , 13.5 36 1890.249 88.3 0.28 1 -- , - 1.052 I 178.6 I 1.79 I - , 13 1 36 36 ,252 84.8 029, -, - 136 1890.96 I 177.6 ~ 1.75 1 - , 13.2 I .255 83.0 0.31 - - , 36 There has been no material change in this pair since .z69 82.4 _-0.34 1 - - 1 36 my measures in 1882. 1890.26 84.6 0.3' I - , - I OE 171. RA. 7h 18~53~Decl. +3x0 52' 89.6 0.34 5.5, 6.5 ' 36 1890.890 189:::ii 82.9 1 0.44 6 36 1.052 1 92.4 0.31 1 6 , 6.4 1 36 1890.96 ~ 88.3 I 0.36 1 - , - 1 1890.91 I 130.9 i 1.13 I 7.8, 9.7 I A binary in rapid motion but the measures are too There is very little, if any, change in this pair since few for the accurate determination of the period. The the first measures. angular motion since I 875 is about 160". 405 406

02 185. .4.C. 5. 8 Sextantis. RA. 7h5~m7sDecl. -1-1'27' RA. 9h46m34s Decl. -7" 32'

o:zo I 6.8, 6.9 36 1890.252 I 114'6 I 0:'~s 1890.9030,939 I 8!13.6 0.21 6.8, 7.2 36 .z69 ' 1139 \ 0.36 1.052 1 6 2 1 '0.24 1 7.0, 7.2 1 36 .280 i l o.30 1'890.96 1 6.0 1 0.12 I 6.9, 7.1 I .So1 1 116.8 I 0.39 1890.27 1 114.1 0.32 There are very few measures of this pair. It has 1 generally been noted as single, or doubtful. It may be in An interesting binary, of which there are too few rapid motion, but the measures are insufficient to decide. measures. The period will probably be not far from 60 years.

Regulus. B 205. RA. Sh27"54" Decl. -24' 12'. RA. lohPos Decl. +rzO 33' B and C. 1890.274 82.2 0.65 7.5, 7.5 I 36

.282 I 81.6 1 0.75 i - , - I 36 1890.255 1 86.0 I 3.01 i - , - ~ 36 1890.28 I 81.9 I 0.70 j - , - 1 ,269 1 86.8 I 3.36 -- 36

.z82 84.2 1 2.78 ~ - 16 Retrograde motion. The angles in the following 1 : 1S90.2; I 85.7 ~ 3.05 I - , - measures are changed, when necessary, to the same side. , There is no change in the double companion to 1874.19 130"+ 0:'7i P Regulus since my first measures in 1878, and therefore 1878.53 100.3 0.63 Cinc, 3 n. both have the same proper motion as the large star, which 188z:zi 96.6 0.5+ Sp 3n. is 0:'267 in the direction of 27405. 1886.17 90.1 c.80 Wilson 2 n. ,3 1077. a Ursae Majoris. E Hydrae. RA. 10~56~19'Decl. +6z0 24'. RA. 8h40m25s Decl. +6'52'.

3890.249 317.4 ~ 0.87 A and B. 1 - - 36 ,252 322.9 0.83 I - ,. - 36

0.21 ~ 1890.903 171.8 ' 1 3.5, 5.5 36 ,255 321.3 ~ 0.79 - , - ~ 36 ,939 ' 168.3 0.1; 1 3.5, 6.0 1 36 ,269 318.6 1 1.00 . - , - ' 36 1890.92 I 170.0 1 0.19 - , - 1 1890.26 1 320.1 , 0.87 , - , - The close pair, discovered by Schiaparelli in 1888, The angle appears to be diminishing : appears to be in rapid motion. These are the only measures: 1889.19 326:~ oY91 0 4n. 1888.28 14200 O:'PI Shp. 6 n. 1888.98 154.4 0.26 P 2 n. P 794. The measures indicate a motion of 16" per annum. RA. 11~47~x3'Decl. +74O 26'. A and B. P 1071. 6 Ursae Majoris. RA. 9h2jm50s Decl. +52" 11' *- I36 36

1890.3.5 I 126.9 1 0.50 1 - , - I 1890.38 [ 79.7 1 4.87 I - , - 1 AB and C. It is evident that the companion has the same proper motion as the large star. The measures of last , 14 I 36 year were: 1889.23 74'9 5:'09 6 3n. 7890.35 I 71.8 5.77 j - , 13.7 I

As the bright star has a proper motion of IYIZ in AB and D. the direction of 240°, the distance of the companion at the date of the above measures should be a little more 78.7 I 26.79 3 '3 than 6" if it had not the same movement. The stars are 7890:~5~1 78.5 I 26.67 I , 13 1 :z certainly physically connected. 1890.37 1 78.6 1 26.73 1 - , 13 1 24a' 407 3c4s 40s

The two -distant .companions are now seen and .A and C measured for the first time. There seems to be considerable 1890.375 6702 71:'28 1 - , - change in the close pair. .383 1 67 5 1 71.60 - , - iz 1881.34 10606 0:42 6 5". .406 67.3 1 71.57 1 - , - I 36 1890.j9 1 67.3 I 71-48 1 - , - 1

.4 and a. (New).

1890.38 1 329.6 I 17.78 I - , 13.5 I The double conipanion to the principal star was dis- :overed at the Washburn Observatory -in 1881. The 2 1728. 42 Comae. 36 inch shows that the larger star is also double, so that R.\. I~~~"'IO~Decl. +IS' 10'. t is now a fine quadruple group. The following are the 1890.326 I 0.84 1 - , - 36 mly other measures : 0.54 - , - 12 ,331 1881.44 34738 I:ZZ CD f 3x1. 0.66 ~ - , - ,334 1 7.8 36 1881.42 67.4 71.50 AC B 3". ,337 11.4 0.78 , - , - 36 1890.33 I 9.3 0.70 I. - , - 8 3'. RA. 14~46~59~Decl. +19' 13'. 2 '733. RA. 13~10~27~Decl. +17" 53'. A and E. 1890.340 j 190.8 1890,331 I 126.0 1 4.50 8.5, 10 I2 1.33 36 1.40 ,334 ! 126.6 I 4.93 -_ 36 ,356 I 191.1 36 1.46 .337 ! 125.8 I 4.97 36 ,164 j 188.9 36 1890.33 j 126.1 j 4.80 1890.35 j 190.3 j 1.40

So change since Struve. A and C. 1890.340 /3 800. Comae 201. 36 36 RA. I 3h I 0~49~Decl. + I 7" 40' .364 1 163.8 1 9.00 36 1890.331 1 113.5 2.13 ! 8 , 10.5 I IZ 1Sy0.35 1 162.7 , 9.03 - , 12.2

.334 i 116.0 1.96 1 7 , 10 ~ 36 I This pretty triple star is near Eootis. The close ,337 ! 116.9 I 1.98 i 7.5, 10 I 36 .-_ - pair was discovered with the 6 inch. It is pretty certainly 1890.33 I I 15.5 I 2.02 ~ 7.5, 10.2 i moving in angle. The foliowing are all the measures: 1874.94 18106 1-11 De 2 n. 1881.36 121P5 1-27 B 4n. 1878.84 188.1 1.35 2 n. 1888.39 120.2 2.22 Comstock 3 n. 1883.71 193.2 1.51 En 6x1. The only other measures of C are: ,3 806. RA. 14~33~27'Decl. -zs0 46'. 1878.25 16104 9-04 0 1 U. A and B. (New). 2 3091. 0.70 7.5, 10 36 RA. 15~9~43~Decl. -4O 26'. i:::1 0.72 1 7 , 9 36 95.9 I 0.59 I 7.5 8 9 36 1890.315 0.33 - , - 36 .406 I ::::1 0.36 1 - , - 1 36 1890.39 1 46.8 I 0.35 1 - , - I The measures of this pair are discordant, and per- 343.2 1.34 8 , 9 36 haps on the whole do not show much change in the angle, 1.20 1 345.6 ' 8.5, 9.5 36 but the distance for the last thirty years has been less 345.9 1.07 I 8.5, 9 36 than it was at the time of 8, and probably about the same as it is now. H. I 28 I.. These are the only other measures: RA. 1j~50"17' Decl. -15~41'. 1879.21 17608 1Y91 ,!? 3~. 1879.05 103.5 33.89 B 4n. 1890.364 I 229% I 35:'12 1. 6.5, 12 I 36 eerschel called the companion zoth magnitude, and F 8x5. gave the angle and distance (estimated) 2 I 5" : 18". There RA. 16~23~16"Decl. +43O 11'. are no other measures. I could not see the small star on two occasions in 1875 with the 6 inch. Herschel's 18 to 20 magnitudes as a rule represent stars which would be called about 12 in the scale used here. 1890.33 I 344.4 1 7.76 I 8.4, 9.7 I ,!l 1087. z Coronae. The change in this pair is due to proper motion, KA. 16~4~~35~Decl. +36O 46'. which measures show is about ol17 per annum. 168.8 1890.280 1 B 241. , '3.5 36 RA. 16~48~24~Decl. -ZIO 22'. I 36 1890.32 1 168.3 I 3.12 1 - , .- I As pointed out at the time of the discovery of this pair, if the companion is not moving through space with 1890.46 ! 160.0 , 0.75 I 7.2, 7.2 I the large star, its distance should increase 0:'34 per annum, Change is doubtful. that being the proper motion of z in the direction of 348". The measures show the stars to be relatively fixed, ,!l I I I 24 Ophiuchi. and therefore this motion is common to both. 7. RA. 16~49~34'Decl. -22O 57'. 1889.21 169P1 3?11 830. 1890.406 i 262.7 1 ,V 2032. G Coronae. ,452 ' 265.2 ~ 0.45 - , - 36 479 264.9 I 0.65 - , - 1 36 R.4. 16h~~m12sDecl. +34' 10'. I I 1890.45 1 264.3 I 0.58 1 - , - I .4 and B. There seems to be no change since the measures of 1890.280 209.5 36 last year.

,337 207.1 ~ 36 I :':: : 1 2 2120. .383 206.9 I 4.20 I - , - 1 36 RA. 17~0~0'Decl. +28O 15'. 1890.33 I 207.8 I 4.08 I - - I 1890.534 Large star not double. 36 A and C. The principal star of this pair was thought to be double by Perrotin in 1883. 1890.280 1 214.7 36 .337 211.4 I ::::; 1 1 I 36 .383 1 213.5 I 12.80 1 - , - I 36 1890.33 1 213.2 I 12.55 I - , - 1 lhe change in the small star is due to the proper 1890406 I 268.8 0.30 - , - 36 motion of AB. .447 1 271.6 I 0.41 i - , - 36 ,452 271.2 ~ 0.42 I - , - 12 B 625. ~7 Herculis. 1 ,496 272.9 0.40 - , - 36 RA. 16~19~52' Decl. +14" 19'. A and B.

1890.375. .. I 178.2 1 1.78 1 - , 12 36 ,383 I 178.3 I 1.74 I - , 11.5 36 1890.38 1 178.2 1 1.76 I - , 11.7 a Herculis. RA 17h9m10s Decl. +14'32' A and D. 36 1890.422 36 36 .447 36 36 .458 36 '890.44 4' ' 304 4'2

3 21 73. A and C. I KA. 7"24"114s Decl. -0' 58' 1890.537 2loo6 10:';5 7.5 I - 36

.542 212.6 10.83 - 1 0 I2 1890.630 No third star. 36 ,548 ~13.;-. 1-0.54 8 , 8.; 12 .633 No third star. 36

1890.54 ~ 212.3 ; 10.7 1 ;.;, S.8 In 1883 Wilson at Cincinnati measured a third star C, IO"', 291:o : 7"k. As this has never been seen any- C and 1) where else, and is invisible no\\', it probably has no real existence. 281 2 2.1; 8.5, 10.5 B 6 2823 2 I; <,I , 10 5 j6 [9 1090. Urnconis. 281.7 2.1; 8.;. 10 5 11.4. 17"27"43' L)ecl. +52" 23'. C and E 1810.334 I 13Pi 4?20 j - I 14 36

,340 , 10.3 4.14 ~ - , 13.5, 36 1 890.537 191.1 6.24 - , 13.5 15.1 14 191.8 ' - . 11.s .356 .... . -4.20 - . - , 36 ,553 6.05

- I 12 1890.34 i 12.8 4.18 -- , 13.8 ~ ,556 189.6 6.25 ' 1850.5 j IC)O.~ 6.19 - , 12.4 The measures of last year gave:

1889.26 13P4 3?97 p 4n. 12 and F.

- 106.0 j 22.22 1 14 ,5' 962. 26 Uraconis. , 106.5 ~ 21.06 - ' '3.5 1:A. 17"33"'44' Ijecl. +6iD 58' 106.7 21.99 - I ... -.1.4 1890334 , 1300 ' o 83 - , - 36 106.4 ' ~z.00 - , 13 8 383 134 5 0 il I - , - 36 406 1300 I- - C and G. - - -O9Op2- -36 . .- 189037 131 5 o 81 - , - , 1890.537 , 212.2 29.69 - , 13 36

The distance of this interesting binary is slowly di- .5j3 ~ 211.6 29 ji - , 13 j6 minishing. . ~-~ ,556 ~ ~ 211.9~ .- 29.46 - . 13..5- 36

1890.55 ~ 211.9 , 29.52 -, 13.: A. C. 7. /L Herculis. Like the stars in the Orion nebula, these stars hate KA. 17~41~~~47~Decl. +27O 48'. remained relatively fixed, and are as uninteresting as the R and C. famous trapezium, aside from their accidental surroundings. The large telescope does not show any additionni stars in 1890.356 9.3 0.63 1 - , - 36 the group near enough to be worth tneasuring. ,375 11.4 0.76 1 - , - 36 ,383 9.2 , 0.61 - , - 36 ,395 7.7 0.65 - , - I 36 ,5' I 125. 68 Ophiuchi. ____- .~ 1890.38 9.4 0.66 I - , - I RA. 17~55~~40'Decl. +I" 19'.

188 00; 5 , Sj 36 H. 1.41. 20.4 094 - , - I 36 RA. iih4z"'~7*Uecl. +7z0 j9' I98 I 087 I - ! 9 36 I2 19; 1 0.91 , - , - 1 1890.452 1 341.3 I 1.5 j ~ 8.5, 8.5 -I2 ,455 I 341.1 1.24 ~ 8.3, 8.3 36 No certain change since last year. ,463 342.1 1 1.28 1 8.2, 8.2 1890.46 1 341.5 1 1.36 1 8.3, 8.3 ,4. C. 15. 99 Herculis. RA. ish~'"28' Decl. +30° 23' Trihd nebula. 1890.406 285.2 0.j7 I 5.5, I I 36 RA. 17"55"6' Decl. -23O 1'. .463 28 j.0 _- 36 A and B. 285.0 I z::: I - - 1 36 1890.45 285.1 ~ 0.56 1 - , - 1 1890.537 23.0 ! 6.07 - 7 11 I 36 .542 23.1 5.84 8 , 10.8 12 Mr. Gore has recently computed an orbit for this .548 I 21.5 I 6.27 1 - , 10 1 12 interesting binary, using these measures, and finds a period 1890.54 1 22.5 1 6.06 ! 8 , 10.6 1 of 53.55 years. 4'3 3048 414

? 641. C and D. (Howe). RA. 18~I 6m43s Decl. +z I' 27'. 1890.594 259?3 I 31'27 I1 , 11.1 I36

.6 I o 261.3 ~ 3.23 I1 , 11.3 36 11 , 11.2 .630 259.8 1 3.23 -_1 36 1890.61 260.1 3.24 1 11 , 11.2 I 1890.45 i 345.9 1 1.01 I 7.3, 9 There seems to. be slow motion in the angle. A and C. 1878.68 356O4 1V07 De I n. 1890.594 1880.12 349.2 1.00 fi 5 n. .6I o .630 2 2384. I 890.6I 19.8 I 11.06 1 -, - I RA. 18~38~33~Decl. +67O 0'.

1890.534 ~ 306.3 1 0.42 A and D. (2'2435). 1890.594 12.6 10.04 'I-,- 36

.61o ~ 11.8 10.16 i - , - 36 I 1 I --, 1 10.10 1 - , - Probably a binary, but there has been little change 1890.60 1 12.2 I in the angle. There has been no change in the Struve star, and probably none in the close pairs. 02'365. RA. 18~521"205 Decl. +44" 4'. 1880.13 35007 1143 ,E 5n. 1880.13 262.7 2.90 B 5 n. 1890.575 Certainly not double. First rate 36 night. H. N.126. This is the principal star of 2' 3130. I have examined R.4. 18~57~10'Decl. -21~43'. this star many times with different instruments, and never saw the least suspicion of duplicity. On the whole, the weight of the evidence is against its really being double. 36

j Sagittarii. 1890.48 I 353.2 I 0.58 I 8 , 8.1 1 RA. 55"os Decl. xsh -30' 3'. This pair seems to be moving rapidly. In 1873, 1890,452 ~ 250.4 I 0.65 - , - I2 finding it had never been observed apparently since the ,499 , 253.6 j 0.90 I - , - 1 36 time of Herschel, and as his description of it was limited ,523 I 249.3 1 0.74 1 - - i 12 to giving it as belonging, to his class I, I looked it lip, 1890.49 I 251.1 1 0.76 i - , - 1 and fortunately estimated the angle and distance. Subse- quently it was measured at Cincinnati, and these are all A binary of short period. Gore, 18.69 years. the observations down to this time. The distance is cer- 2 2438. tainly diminishing, and probably the motion in angle is rapid. RA. xShj5"Z9' Decl. +58"4'. 1873 40°1 I"& ,9 0.83 Cin. 2 n. 1890.499 ! 4j.O ! 0.25 I 6.5, 6.7 1 $ 1879.53 22.4 .537 i 41.3 i 0.23 - , - 1890.48 353.2 0.58 3". .573 I 45.6 1 0.27 I - , - I 36

1890.54 1 44.6 ~ 0.25 1 - , - 1 B 975. This binary is now opening out, but the motion is RA. xgh~om4*Decl. +34' 21'. slow. The measures here, taken in connection with those B and C. of B and 08, indicate a period of about 120 years. Herschel's angle in 1783 seems to be some 20' too small to fall in with the later observations.

le 973. 1890.63 1 222.3 1 0.83 1 9.3, 10.2 1 RA 18~55~59'Decl. +8O 34'. -4 and B. A and B. (02367). 1890.594 350.1 I 1.49 1 9 , 11.5 1 36 1890.633 1 227.3 I 33.34 I 7.5, - I 36 .6 I o 350.0 1.72 9 , I2 36 No change in the wide pair, and probably none in .630 350.0 I 1.59 1 9 , 10.8 I 36 the other. I 890.6 I 350.0 I 1.60 1 9 , 31.6 I 1880.59 zz1P8 01'77 B 3n. 4'5 416

/3 248. 2 Vulpeculae. A.G.C. 10. RA. 19~12~39"Decl. +zz* 49'. RA. 19h39m15" Decl. +loo 20'.

1890.613 126?9 1 1Y71 I - , - 36 A and B. ,630 124.6 1.91 36 1890.594 0:'24 1 8.5, 8.6 36 .649 124.8 1.89 36 1 ~~~~~ - __ 1 1 .61o 1 1 0.25 8 , 8 36 1890.63 I 125.4 I 1.86 ! - , - .630 1 146.0 0.22 i 8.3, 8.5 Some of the measures of this pair are not very 1890.61 I 145.1 ! 0.24 I 8.3, 8.4 accordant, but on the whole there is little evidence of change. AB and C. (Yr2570). 1876.11 12~00 1:'86 De 6n H. A. Howe. RA. 19"14~37' Decl. +zo 43'.

1890.61 I 277.6 1 4.30 I - I 9.4 I 1890.556 333.2 ~ 0.35 8.5, 8.5 36 .564 335.8 0.40 8.0, 8.2 36 The close pair was discovered by Mr. Clark in I 8 7 5 1 I 1 ,573 333.0 1 0.43 t 8 , 8.2 I 36 with the 12 inch which is now at the Lick Observatory. There is no change in the 2 companion. The following 1890.56 I 334.0 1 0.39 1 8.2, 8.3 I are all the measures of AH: No evidence of change since its discovery by Howe at Cincinnati. 1878.35 145?5 0:'29 8 3 n. 1879.52 336:o 01'4i Cinc, 3n. 1880.22 147.6 0.29 3 n.

B 141. A. G.C. I I. 5 Sagittae. RA. 19~16'"5oS Decl. +zzo I 7'. RA. 19~43~~39~Decl. +18O 51'. 0.81 - , A and H. 1890.613 I 81.5 1 1 - ~ 36 79.0 0.84 - , - 1 36 1 1890.496 1 779.7 1 0.13 ' ~ 36 ::;: I 77.0 1 0.75 , 7.5 I 8.5 i 35 ,537 175.7 I 0.12 1 1 : 1 1 36 1890.64 1 79.2 0.80 1 - , - 1 .573 1 183.8 j 0.10 I - , - i 36 This is the principal star of the wide pair, H. 2867. 1890.53 1 179.7 I 0.12 I - , - 'I The large telescope also shows that H.'s companion, 26" This pair was also discovered with the 12 inch, now from the larger star, is a 4" or 5" pair. Thus far there belonging to the Lick Observatory, by Mr. Clark in 1875. is no evidence of change in the pair measured above. It has now become a very close and difficult object. The change has been largely in distance. Special attention was De. 21. given in these measures to the proper quadrant for the RA. I~"Z~"I' Decl. -z0 22'. smaller component. The angle found last year should be A and B. increased 180". This pair will have a moderately short period, but will always be a difficult object, as the maximum 7.5 9 36 distance cannot much exceed 0:'3. i::: 1 7 , 9 36 1.03 7.5, 9 ~ 36 Ho. 276. lS90.70 I 66.9 I 1.04 I 7.3, 9 I R.4. 19~53~16~Decl. -loo 16'.

A and C. (B2535). 1890.655 Apparently single. First class I 2 night. 1890.675 298.0 26.15 9 j 36 .709 Nothing seen, but not the best 36 .706 297.9 26.17 9 1 i I : 36 seeing. .709 298.1 26.30 1 -z , 9.5 i 36 1890.70 I 298.0 1 26.21 I - , 9.2 I Described by Ho. as elongated in the direction of This star has a large proper motion of The close pair is the principal star of 2535, dis- rpzP9 (1887.75). 2' 0:'507 in 221%. covered by De. in 1865. There is very little evidence of change thus far : 02 392. RA. 19~53~54'Decl. +41O 56'. 1865.76 iooo I:'ZZ De 2 n. I observed this star principally for the purpose of A and B. finding whether the third star near A, suspected by De., 1890.675 305.3 1 0.28 I 7 , 8.5 36 had any real existence. 1 have never been able to see it .687 306.8 0.32 I 8 , 9 1 36 with other large telescopes, and as the 36 inch fails to .689 306.4 I 0.28 I 7 , 8 1 36 show it, it will not be necessary to make any further search. 1890.68 1 306.2 1 0.29 I 7.3, 8.5 1 417 3048 8 677. T Cygni. RA. 20h4Zm23' Decl. +33" 56' 1890.675 289P9 3:"9 19 136 .687 293.0 3.19 , 9 ' 36 A and E. ,689 291.6 3.11 - , 8.5 36 -- 1 1 1890.499 1 rzrPz 1 9793 1 5 , 12.5 1 36 1890.68 .518 121.0 9.64 5.5, 12 36 .534 j 120.6 1 10.15 I 6.2, I2 I 36 1890.52 I 120.9 I 9.91 I - , 12.2 I

A and C.

.518 I '3 1 36

1890.675 263.6 0.31 7.5, 7.8 36 1890.52 1 194.4 I 12.35 1 - , 13.3 1 .687 I 263.3 1 0.31 1 7.5, 7.6 1 36 The principal star is T Cygni of the variable star ,689 I 265.0 1 0.30 1 7.5, 7.6 1 36 :atalogues. The second companion, C, is now observed 1890.68 [ 264.0 1 0.31 1 7.5, 5.7 I or the first time. My original measures of B require a :orrection of in the angle. Certainly binary, but the motion is very slow. The 180° angle has diminished only 19" since the measures of 2' in 187841 rzr03 91'66 8 in 1836, and the di9tance has remained nearly constant. Secchi. 8 668. B. A. C. 7080. Rh. 20"58"43' Decl +3O 3' RA. 20~25~49'Decl. -10' 16'. B and C.

1890.675 152.1 1.16 9.5 I 9.5 36 ,678 148.8 1.17 91 9 36 ,681 i 151.7 1 1.12 36

The large star has a proper motion of 0:'286 in thc direction of 66". As this is common to both stars, the! undoubtedly form a physical system. The following arc 1890.675 I 155.6 1 3.11 I 7.5, - all the measures : .678 152.3 2.96 7.3, - 36 1878.63 .29?0 4:64 8 30. ,681 155.6 3.01 7.7, - 1881.67 26.1 4.99 8 4n. 1890.68 1 154.5 1 3.03 1 7.5, - 1 The close pair was discovered by Secchi in 1856. 8 I 5 I. 8 Delphini. There has been some change. RA. 20~31~55~Decl. + 14' 11' 1856.60 rz;0o 0:'6 Se A and B. 1863.88 141.7 0.8 De I n. 1877.79 148.9 1.13 /3 I n. 1890.447 The Struve star has remained fixed. ,496 .499 .5 2 6 1890.49

AB and C. 1890.630 89.2 I 0.64 I' 7.0, 7.5 36 1890.445 13636 .649 1 88.3 0.56 7.0, 8.0 36 .458 .652 88.6 I 0.53 I 6.7, 7.8. 36 .479 117.2 I 27.05 __ 36 1890.46 117.3 [ 26.89 -,- I The distance of this rapid binary is increasing, an it will be comparatively easy to measure for a few year! The last computed orbit of 16 years is certainly too shor It will probably be about 28 years. Ed. 127 .4'9 420

Discovered by Dembowski in 1875. He seem to have had some doubt as to whether the elongation measured was real. I have never been able to see it with any in- strument, and hardly think it can be double.

'The close pair was discovered with the 6 inch in B 164. 1873. The large telescope shows a double companion RA. 21~19~13~Decl. +8" 52'. not seen before. Slow retrograde motion in AB. .A and B. 1876.78 97E1 0'55 De 5n 1SS1.63 90.4. 0.63 B 3 n 1890.675 1 24103 7 7 7.3 36 .681 239.5 ~ E.:P I 7.8, 8 1 36 .709 1 2.19.9 I 0.49 8 , 8.1 1 36 2,758. 61 Cygni. 1890.69 I 240.2 1 0.50 I 7.6, 7.8 I RX. z 1~14~Decl. +38O 8'.

1890.862~ 121.0 21.38 ,'I - - A and C. (22793). 21.17 - , - .867 1 121.91 I A73 122.3 21.01 .S76 i 122.3 I 21.02 1 1

~~ 1890.87 ~ 121.9 I 21.15 1 -, - I 1890.69 1 241.5 1 26.99 , - , 8.7 I An exarnination of the measures of the last sixty years shows, assuming the proper motion of A, 5:'196 in The close pair discovered with the 6 inch, 1873. No the direction of 5105, to be correct, that the proper motion sensible change in the 2 companion, and very little, if of I3 is 5:"13 in the direction of 53". The measures any, in the other since it has been observed. show conclusively that this motion is uniform and recti- 1875.46 241'6 0157 De 4n. linear. (See Sidereal hlessenger, January, 189I). B 684. Ho. 283. RX. zih ~3~53'Decl. -5" 57'. RA. 2 ih 6"'14* Decl. +35O 49'.

~ 1890.675 128.1 I 1.20 ~ 8.7, 9 I 36 Cannot see large star double. 1Syo.649 36 ,678 1 125.0 1.13 1 8.5, 8.7 I 36 Good night. ,681 ~ 127.1 1.03 I 8.8, 9 I 36 No close star seen. .65? 36 1890.68 ~ 126.7 1 1.12 8.7, 8.9 ~ Described by Hough, 17S"+: 0:'S-t : 6.8 , 12. -3s there is a distant companion, there is no doubt of the Perhaps some angular motion : identity of the star examined. 1878.62 133"9 I"II ,f? I n.

A. G.C. 13. z Cygni. B 72. RA. 21~lomoS Decl. +37O 32'. RA. 21~23~43~Decl. -5" 55'.

A and B. 1890.675 ~ 40.3 ' 1.90 I 8.3, 8.7 1 36 .678 44.5 1 1.87 8.3, 9 I 36 .6s1 I 41.8 1.76 i 8.3, 9 i 36

0.52 1890.68 ~ 42.2 I 1.84 1 8.3, 8.9 ~ 1890.54 1 20.5 i 0.54 1 - , - 1 These two pairs are in a low power field with 3 Aquarii. A and C. 1878.17 4301 ]:'go ,9 zn. 1890.496 ' 245.4 19.65 - , - 36 1 ,!? x Pegasi. 245.2 ~ 19.88 - - ' 36 989. 245.5 I 19.80 I:- - 1 36 R.4. 21~39~12'Decl. +25" 6'. 1890.53 I 245.4 I 19.78 I - , - I 1890.526 1 191.2 0.08 - , - 36 One of the most interesting of the binary stars, and .573 , 176.5 1 0.10 1 - , - I 36 now a difficult pair to measure. ,575 ' 202.8 0.10 - , - 36 .61o 1 178.0 0.10 - , - 1 1 i 36 I 4 Aquarii. 1890.57 1 187.1 0.10 1 - , - 1 RA. Zlhgm52' Decl. -9O 43' The measures seem to indicate that this will have 1890,777 Certainly not double. Fine seeing. 36 .he shortest period of any double-star known, about eleven ZZP 423 3048 424 A and C. I Ho. 199. 95 Aquarii. RA. 23h12m43' Decl. -1o0 16'.

1890.610 21609 I 1:15 5 , 13 36 ,630 1 220.3 1 1.13 - 11.5 36 .63.~ - 1.16 I - : 11 1 36 1890.62 I 218.6 1 1.15 I - , 11.8 1 During the evening of the last measure, the micro- meter was disturbed, and this with other angles were lost.

B 278. RA. ~3~15~20' Decl. +61O 33'.

1890.630 1 174.0 12.68 I 6.5,11.5 36 0.50 7.7, 8.5 36 ! i .633 173.7 12.62 6.5,11.5 36 0.46 7.5, 7.8 36 ! .65z 173.9 I 12.69 1 6.8,12.51 36 0.43 I 7.5, 8 36 ! 1890.64 I 173.9 1 12.66 1 6.6,11.81 No other measures.

Ho. 300. 66 Pegasi. RA.~3~17~1~ Decl. +II" 39'. 1890.652 Not the least trace of duplicity 36 with 1900. According to KO. this is an equal pair, elongated (1889.85) in the direction of 312P1. I could see nothing to indicate this with any power on the 36 inch. The con- ditions were favorable. B 715. Aquarii 290.

RA. ~3~ 8"25' Decl. - I IO 20;

1890.630 255.8 3.56 I 6.8,11.7 I .36 .65z 1 257.8 1 3.58 1 6.5, 12 I 36 1890.630 I 5.9 I 0.46 1 8.5,8.8 36 ,660 257.2 1 3.35 6.5,11.5 , 36 ,633 i 0.6 0.59 8.5, 8.8 36 1890.65 1 256.9 1 3.50 1 6.6,11.7 I ,652 , 5.7 I 0.52 ~ 8.0, 8.2 36 The Cincinnati observers in 1877 measured the large star as a close pair, 1P5 : 0332. This was carefully looked for with the 36 inch in making the above measures, and there was no trace of any elongation at any time. There seems to be no change in the measured star: 1878.29 25600 3335 B 4n. I ,!3 720. 78 Pegasi. B 992. RA.~3~28~0~ Decl. +30" 40'. RA. ~3~10~48~ Decl. +63O 29'. 1890.526 I 147.8 1 0.32 - , - 36 1890.630 162.0 0.31 1 8.3,8.3 1 36 ,556 I 146.9 039 36 ,633 1 163.2 1 0.37 8.3, 8.3 I 36 .564 , 150.1 1 0141 I 1 1 1 36 ,652 159.2 0.34 1 8.0, 8.2 I 36 1890.55 I 148.3 I 0.37 I - , - I 1890.64 I 161.5 I 0.34 I 8.2, 8.3 I This is certainly a binary system. The change is The only ' other measures are : principally in angle, which amounts to about zoo since it 1880.59 17GP5 oY41 B 5x1. was discovered in 1878. 425 426

A and C. 1890.496 35700 23:'53 - , - 36 ,499 356.7 23.56 - - 36 .564 1 356.5 23.68 - - I 36 1890.52 I 356.7 I 23.59 I - 9 - I The measures agree well with the computed place 1 from Schaeberle's orbit. The period of 22.3 years cannot be far wrong.

New Nebulae.

In the course of my double-star work a faint nebula Star and nebula. (South) is occasionally found, usually in the field with some bright RA. 3h 7"'26" Decl. +37" 25' 18". star under examination. These are almost invariably new, or wanting in Dreyer's General Catalogne, and when near 1890.698 221P5 49:'16 - , - 36 enough to a prominent star to be measured directly with ,709 I 220.0 I 49.64 I 11.5, - I 36 the micrometer, I have saved them as far as it could be 1890.70 I 220.7 I 49.40 111.5, - I done without interfering with the regular work. With the high powers and small fields of the eye-pieces used in ob- Star and nebula. (North). serving double stars, a nebula would rarely be seen except 1890.698 1 304.2 1 76.29 1 - , - when near a star. The lowest power used has a field of ,709 303.6 76.06 I - , - I only 5', much too small for very faint, diffused objects. :z The following nebulae have been measured with the 36 inch. 1890.70 I 303.9 1 76.17 1 - , - 1 The places given are those of the stars from which the Both nebulae are measured from the same star. Its nebulae are measured, the star in each instance being the place as given above was obtained by Mr. Barnard from primary. RB.VI +370753, which is 3'"~1f7f, and 4' 24:'s n.

Q Piscium and nebula. DM. +2P684 and nebula. R .4 ih 19~47~Decl. +18O 33'. R.4. 4h 12~48' Decl. +zo 48'.

I 890.564 1890.709 224.8 1210.39 ~ 9.5, - I 36 .6 I o .760 1 224.9 211.22 ~ 9.5, - 36 .633 .785 1 224.4 1209.73 1 - I - 36 1890.60 62.6 1159.29 1 - , - 1 1890.75 1 224.7 1210.45 1 - , - 1 Very faint. 94 Pisciuin and nebula. Dreyer 1550 and nebula. RA. 1~20~13~Decl. +18"37'. RA. 4hr3m23s Decl. 4-2" 7'. 1890.564 117.4 1211.63 - , - 1 1 36 1890.760 I 163.5 1187.88 1 - , - 36 .61o 118.3 ~11.70 -, - 136 .785 I 162.9 1189.43 I - , - I 36 1890.59 i 117.8 1211.66 I - , - I 1890.77 1 163.2 I 188.66 i - , - 'I -4 little brighter than the preceding. This is in the field with one of d'Arrest's nebulae, with which the new one is compared. That found by Star and nebula. d'Arrest is at least six or ,eight times brighter than the other. There is a faint star, about 13", between the two. RA. zh53"4SS Decl. +37" 17' 52". La]. 29710 and nebula. 1890.698 114.6 95.33 9.5, - 36 I 1 1 RA. 16~11~29'Decl. +36O 52'. .709 114.8 95.48 10 , - I 36 1890.70 I 114.7 I 95.40 1 9.7 I - I 1890.383 200.3 105.55 - , - 36 ,395 I 200.1 I104.95 - 36 The comparison star is not in the DM. The place .4zz 200.1 1104.79 - 36 given was determined by Mr. Barnard with the micrometer 1 1 I 1890.40 ~00.1 1105.10 - from W, 2h1203. There is a faint star about 12'' from 1 1 - , 1 the nebula in the direction of 248O. The star is seventh magnitude.