187 6MNRAS. .37. . .12A hm hm hm not succeedinobservingthethorn-likeprojectionsoflightseen hm o on thesolarcuspsbyCaptainNobleandothersduringeclipse of theObservatory.Notwithstandingacarefulscrutiny,Idid of Septemberlast.Theeclipse,whichwasequaltoaboutone- third oftheSun’sdiameter,hadaninterestingeffectonablack- bulb thermometerenclosedinanexhaustedglassglobe. visible thelastglimmersoftwilight.Imadeusea4-inch sphere wasmagnificent,notasinglecloudvisibleabovethe refractor (bySecretanofParis),withanastronomicaleyepiece, horizon, norwastheslightestbreezeperceptible,skyhaving an extraordinaryandexceptionalpurity.Tothewestwere Bue, whichIkeptconstantlybeforeme. Beer andMädlersomephotographsofMr.WarrenBeLa of thepower92diameters.Tosketchprojection Observations oftheLunarEclipse,1876,September3,madeat 12 SeñorArcimis,ObservationsoftheLunarEclipse,xxxvn.i, graphical co-ordinatesofmyobservatoryare: At 7i5IsawthepenumbrawhichconcealedOceanus terrestrial shadowIemployedareducedmapoftheMoon At 74oIcouldseewiththenakedeyethatlightwas At 75o(hourofthefirstcontact)shadowreached At 85thelimitsofshadoware,to east,3.8lat.N., Windsor, NewSouthWales, h At 7Icommencedtheobservations.Thestateofatmo- The hoursareaccordingtoCadizmeantime;thegeo- © RoyalAstronomical Society•Provided bytheNASAAstrophysics DataSystem 1876, Sept.21. o Procellarum, MareImbrium,SinusÆstum,and scarce intheNE.quadrant(invert,vis.)andtook peak Cleostratus(althoughoftheprecisemoment to MonsHarpathusandSinusProris.Fiveminutes I amsomewhatdoubtful),andenlargeditselfrapidly I detectedsomeoftheabsorptionlineson red, a reddishtint. Mons Carpathus. the uakedeye. later Icouldseewdthgreatfacilitytheshadow with the shadowadvancedandlightbecamefainter, solar spectrumappearedasitwasexpected, but as directing ittothecraterLavoisier;common craters Lavoisier,Mairan,Plato,Archytas,Mayer ; produced bytheEarth’satmosphere. and endstothewestin82lat.N. hm Lat. N.=36°ax'52"-8; Long. W.Greenwich=o25n'^. Cadiz. ByAugustoT.Arcimis. I thenappliedthespectroscopetorefractor, I appliedagainthespectroscope, andinthe 187 6MNRAS. .37. . .12A ! hmo h111 h10 hm0 11m0 hm hmo hme hm Kor. 1876.1^76,September3,madeatCadiz.13 At 820thelimitofshadowcrossed28lat.K.,on At 832theshadowreachescraterAristarchus;thiswas At 8qithelightappearedagainuponthiscrater,and At 85otheshadowisboundedtoeastby34lat.X., At 96thelimitswere,toeast.40lat.X.,craters At 857timeofthemiddleeclipse,accordingto At 924theshadowisboundedtoeastby56lat.X., At 949thelimitsare,toeast,66lat.X.,cratersPytha- At io4thelastcontacttookplace,with shadowverynear © RoyalAstronomical Society•Provided bytheNASAAstrophysics DataSystem c e o 0 0 0 little visibleonaccountofwantlight,butnear darkest partofthelunardiskspectrumwas 0 F andC,wheretheybecameverynumerous. the limitsofshadowIfoundtelluriclines on thered,betweenDandF.aboveall the east,cratersBriggs,Diopkantus,onmiddle of MareImbrium,craterAutolyeus,PalusKebularum, its highestpoint,ontheXE.quadrant. ends tothewestin6olat.X. Macrobius, theborealedgeofMareCrisium,and shadow pursueditsdescendingpath. crater Burg,LacusMortis,Endymion,and middle ofMareYaporum.craterYitruvius,and the Ephemeris,andshadowbegunto finished tothewestby30lat.X. crater Euler,MonsApenninus,Hœmus, east by36lat.X.,cratersEuler,Manilius,onthe Diophantus, Euler,Pytheas,Manilius,PalusSomnii, ends tothewestby22lat.X. peared, butthoseontheredremainedveryvisible. was thedarkest,hadanoraneecolour,and west in18°latX. crater PicardinMareCrisium,andendedtothe similar tothelightofSatnra. other partsoftheshadowwerealividwhite, some ofthetelluriclinesonviolethaddisap- of Archimedes,PalusPutredinis,cratersMenelaus, Jansen, Condorcet,andendstothewestin12lat.X. craters Cleostratus,Sharp,somewhattothenorth pathus andSenopidus,onthemiddleof Mare goras, LaCondamine,athalfthedistanceof Har- Almanac. quadrant. use ofarepublishedhereunderthetitleNautical Agarum, andendstothewestby16lat.X. tion andtheEphemeris;thosewhichIhave made Mare Humboldtianumby53lat.X.onthe XO. difference inthislastcontactbetweentheobserva- Serenitatis, craterProclus.MareCrisium, crater The neighbourhoodoftheborealpolewhich I madeanotheranalysiswiththespectroscope; It seemstomethatIcanpointoutasmall