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379 2 784 Corrections to the Uranometria Argentina and the Cordoba Catalogues. In Nos. 2377 and 2390 of the Astr. Nachr. are lists all the mistakes in the Uranometry, which have come to. of errors detected in the Uranometria Argentina. The for- my knowledge up to the present time. mation of the General Catalogue permitted a farther test These corrections are, all of them, to the chapter of the positions of the Uranometry, by collating them with containing the star-places; and although the list is long, these careful determinations. Some misidentifications were I do not think it will be deemed unreasonably so, when thus brought to light, and a considerable number of other the difficulties in the way of the original work are taken errors of cotnputation and typography ; and, before leaving into account. For the means of identifying stars and of Cordoba, I prepared a new list of errors. determining their positions, otherwise than by direct obser- Although this third list was mentioned in a letter vation, were very limited; and the obstacles encountered in the from Cordoba, published in A. N. 2644, and my impression printing and typographical revision need not be described anew. has been that it was sent you long ago, I have now dis- I avail myself of the opportunity to call attention to covered that it has remained among my papers here. And four erroneous positions, which unfortunately still exist in in sending it at this late day, I am able to add yet other the General Catalogue, and have been sent me by Dr.'I'home; cases, since detected. Should there be place for it in the as also another list of errors in -the Zone-Catalogue, being A. N., I shall be glad thus to complete the catalogue of supplementary to the lists published in A, N. 2659 and 2688. Corrigenda in the Uranometria Argentina. Page No. Cat. cf 6 Mag.

I 5 I 20 substitute L. 4683 I I 1~14~37" 2010 6.6 I 7 7 Scorpius 175 d L. 7470 17 44 32 34 4.8 6.9 178 Corona Austr. 45 2 L.1999 '9 I 9 42 5.3 6.2 192 Hydra I I 811, a D L1. 18392 19 13 5 16 17.4 I 3i4 195 Hydra 376 >> L.5922 14 16 37 29 6.4 7.0 zoo Ophiiichus 175 9 L1.32647 17 45 57 -6 6.7 6.7 202 Libra 761j2 insert I,]. 28157 15 20 55 8 30.6 6.8 L1. 10020 5 13 48 18 39.1 204 Lepus 63'4)7 6.1 35 substitute I,1. I0021 5 '3 49 I8 38.5 205 Aquarius 10 9 L1.40196 20 43 21 --5 36.5 var. 209 Cetus 65 2 L1. 1069 o 34 20 5- 2.3 6.0 (LI. 2791 I 25 32 19 40.0 21 I Cetus 162 >> 6.3 \L1. 2799 I 25 31 19 40.6 5 '12 WB. 4 10 2 37 10 16.4 6.6 - 226 Sextans- 29 --- >> - - Page Constellation Col. for p Ll t Page Constellation Col. for Put -- __ ___- '3' Octans 40 Decl. 3 116 '55 Centaurus 3 5 4 Cat. L. 5973 >) 60 Decl. 55:5 '59 16 Decl.. 1519 '33 Hydra 5 5 Decl. 27:4 I 60 9 86 >) I 4:o '34 ,4pus 16 AR. '9" 9 111 >> 117 > 2 '35 41 Decl. 11% 161 2 '97 >> 50:9 136 5lb 9 2 2:s 2 207 .4R. 2 OS 2 64 9 7 0" B 227 Decl. 4319 > 66 8 3: 5 162 242 )> 13:7 2 73 AR. 2 7" x 268 x I 818 '37 2 "7 Decl. rI9 Telescop. rb Cat. L. 7566 B 9 138 75 4315 '63 44 Decl. 3 $0 I39 18c B 27:7 >) 73 AR. 47' B 75 B 30.'6 '65 49 Decl. 3910 14' Carina 51 B 5615 166 > 64 2 I 1.'y '44 6 >) 4714 I 68 TAI~LIS 23 Cat. H. 4986 - '45 Circinus 9 Cat. I73 Puppis 205 Decl. 3415 )) '48 Decl. 5 4.'6 B 2r9a Mag. 7.8 > 1.'6 2 '46 Triang. A 37 219b 9 7.0 '5' Centaurus 3 5 a AR. I 6s 2 220 Decl. 3llt B 51a Cat. B. 3678 B 238 AR . 5 9s D 5'b 2 L. 4807 '75 Scorpius 38a Decl. 7:4 B 72 Decl. 14:4 > 49 >) 212 381

7 - Page Constellation Col. for Constellation Col. for __ - I79 Sagittar. 36 Decl. 42(9 Cetus I 18 Decl. 36.'0 I81 3 216 > I 3.'8 W 129 XK. 25" p 273 Cat. LI. 38227 > '74 Decl. 56.'1 1 83 5 Decl. 20:7 P 178 .4R. 23s 186 Fornax 5 >) 3015 >I 208 Decl. I III 191 Hydra 39 AR. 33m B 219 n 37:9 192 D goal Mag. 7 l12, 6 '14 > 230 &4R. 4" '93 3 164 Decl. 3318 D 244 Decl. 28,'s n I80 n 2 IlO Crater 5 AR. 4zS 183 )) 25.'3 n 41 Decl. 3110 n 205 % 24:5 u 46 )) 2 1:6 '94 D 256 >) 5711 50 AR. 4s B 355 )) 48:2 Virgo 41 Decl. 33:7 20 I Libra '7 38.'5 3 '05 >) 42:8 202 n '07 D 49.' I n 255 n 6:6 Capricorn. I 9 8 2 4.'0 Serpensb 24 AR. 41S 203 D 32 AR. 2 6" Scutum 27 Decl. 3.'2 206 Aquarius 36 Cat. 111. 45759 153 Mag. 6.5 207 P 166 Decl. 5 I.'3 > I54b u 7.5 2 08 s 231 AR. 25" 30 Decl. 5 210 D 268 Decl. 4'13 )) '23 I) 2 717 209 Cetus 15 n 8:9 n 125 > 40.'8 n 43 )) I .' I Sextans 61 AR. 2 0s 210 B 96 n 27:5 Pisces 83 Decl. + Corrigenda in the General Catalogue. Yo. 14607 Minute of R4. should be 34", not 35". Same star as No. 14584. 21525 8 D >) n B 47", not 46m. 27396 is same star as No. 27395. The constellation is Sagittarius. 28063 Minute of RA. should be 2om, not 21~.Same star as No. 28039. Corrigenda in the Zone-Catalogue.

185 7.3061 for 37"37'33T4 read 37"35'33:4. star as No. 1518. 345 10.3675 is the same star as No. 3674. 196 16.3002 for 42"51?34 read 42"'52234. Same 350 10.4107 IS the same star as NO. 4105. star as No. 3005. 391 11.3526 for 24"s' 37:' read 24'5'3611. 297 19.1592 is the same star as No. 1589. 304 2296 is the satne star as No. 2294. 313 20.766 for 44'24'53Y5 read 44'44'5318.

Correction der Ephemeride des Corneten 1886VIII in A. N. 2'783. Nach den Elementen von H. V. Egbert im Astr. Journal Nr. 155, welche auf einer zweimonatlichen Zwischenzeit beruhen, und daher den Lauf des Cometen voraussichtlich nahe darstellen werden, sind an meine Ephemeride in A.N. 2783 die folgenden Correctionen anzubringen. Ad -171~ April 27 +4'"3oS - 610 -27 1 -17 Mai I 4 40 8.2 19.3 -28 -15 5 4 48 10.4 -28 -16 25 4 52 21.5 9 1 53 12.6 29 +4 47 -23.6 I3 +4 56 -14.9 -28 -15 der 4. Deciniale angesetzt.