CIHM Microfiche Series (Monographs) iCIVIH Collection de microfiches (monographies) Canadian Institute for Historical Microreproductions / Institut canadien de micrcep-oductions historiques IQQQ Technical and Biblioaraphic Notes / i'>'j'.3S techniques et bibliographiques The Institute has attempted to obtain the best onginsl copy available for filming. Features of this copy which may be bibliographically unique, which may alter any of the images in the reproduction, or which may significantly change the usual method of filming are checked below. □ Coloured covers / Couverture de couleur □ Covers damaged / Couverture endommagee □ Covers restored and/or laminated / Couverture restauree et/ou pelliculee Cover title missing / Le titre de couverture manque I j Coloured maps / Cartes geographiques en couleur □ Coloured ink (i.e. other than blue or black) / Encre de couleur (i.e. autre qua bieue ou no're) □ Coloured plates and/or illustrations / Planches et/ou illustrations en couleur Dound with other material / Reli^ avec d'autres documents Only edition available / Seule edition disponible Tight binding may cause shadows or distortion alcrig interior margin / La reliure serree peut causer ce I'ombre ou de la distorsion le long ce la marge interieure. Blank leaves added during restorations may appear within the text. Whenever possible, these have been omitted from filming / Use peut que cerlaines paces blanches ajoutees lors d'une restauration apparaissent dans le texte, mais, lorsque cela e^ait possible, ces pages n'ont pas ete filmees. D D n n ' institut a microfilme le meilleur exemplaire qu'il lui a ete possible de se procurer. Les details de cet exem- plaire qui sont peut-etre uniques du point de vue bibli- ographique, qui peuvent modifier une image reproduite, ou qui peuvent exiger une modification dans la m6tho- de normale de filmage sont indiques ci-dessous. D D D Coloured pages / Pages de couleur Pages damaged / Pages endommagees Pages restored and/or laminated / Pages rectaurees et/ou pelliculees r~^ Pages discoloured, stained or foxed / I — I Pages decolorees, tachetees ou piqu6es Pages detached / Pages detachees L/j Showthrough / Transparence D D D n Quality of p.int varies / Qualite inegale de I'impression Includes supplementary material / Comprend du matv ■ i\ supplementaire Pages wholly or partially obscured by errata slips, tissues, etc., have been refilmed to ensure the best possible image / Les pages totalement ou partiellement obscurcies par un feuillet d'errata, une pelure, etc., ont ete filmees a nouveau de fagon a obtenir la meilleure image possible. Opposing pages with varying colouration or discolourations are filmed twice to ensure the best possible image / Les pages s'opposant ayant des colorations variables ou des decolorations sont filmees deux fois afin d'obtenir la meilleure image possible. [1 Additional comments / Commentaires supplementaires: Continuous pagination. This item is filmed at the reduction ratio checked below / Ce document est filme au taux de reduction indique ci-desscus. lOx 14x lex 22x 26x 30x 1 1 "■V ?"> The copy filmed here has been reproducad thanks to the generosity of: Ecolc polytcchnique, Universitc dc Montreal, Bibliotheque The images appearing here are the best quality possible considering the condition and legibility of the original copy and in keeping with the filming contract specifications. Original copies in printed paper covers are filmed beginning with the front cover and ending on the last page with a printed o' illustrated impres- sion, or the back cover when appropriate. All other original copies are filmed beginning on the first page with a printed or illustrated impres- sion, and ending on the last page with a printed or illustrated impression. The last recorded frame on each microfiche shall contain the symbol — ♦- (meaning "CON- TINUED"), or the symbol V (moaning "END"), wh:>:hevar applies. Maps, plates, charts, etc., may be filmed at different reduction ratios. Those too large to ba entirely included in one exposure are filmed beginning in the upper left hand corner, left to right and top to bottom, as many frames as required. The following diagrams illustrate the method: 1 2 3 L'exemplaira fil.nd fut reproduit grace k la g^ndrositd de: Ecole polytcchnique, Universite de Montreal, Bibl iotheque Los images suivantes ont 6t6 roproduites avec le plus grand soin. compte tenu de la condition et de la nertet6 de l'exemplaira film6, et en conformity avec les conditions du contrat de filmage. Les exemplaires originaux dont la couverture en papier est imprimde sont film6s en commencant par le premier plat et en termmant soit par la dernidre page qui comporte une empreinte d'impression ou d'illustration, soit par ie second plat, selon le cas. Tous les autres exemplaires originaux sont filmAs en commenpant par la premidre page qui comporte une empreinte d'impression ou d'illustration et en terminant par la dernidre page qui comporte une telle empreinte. Un des symboles suivants apparaitra sur la derniire image de chaque microfiche, selon le cas: le symbole — ♦> signifie "A SUIVRE". le symbolo V signifie "FIN". Les cartes, planches, tableaux, etc., peuvent etre filmis d des taux de reduction diff^rents. Lorsque la document est trop grand pour etre reproduit en un seul clich6. il est film* k partir de Tangle supirieur gauche, de gauche ^ droite. et de haut en bas, en prenant le nombre d'images n^cessaire. Les diagrammes suivants illustrent la mdthode. 12x 16x 20x 24x 28x 32x 1 2 3 4 5 6 CIHM Microfiche Series (l\/lonographs) ICIVIH Collection de microfiches (monographles) Canadian Institute for Historical Microreproductions / Institut canadien de micrcer-oductions historiques 1999 Technical and Biblioaraphic Notes / I'.Vjt^s techniques et bibliographiques The Institute has attempted to obtain the best original copy available for filming. Features of this copy which may be bibliographically unique, which may alter any of the images in the reproduction, or which may significantly change the usual method of filming are checked below. D Coloured covers / Couverture de couleur I I Covers damaged / Couverture endommagee □ Covers restored and/or laminated / Couverture restauree et/ou pelliculee Cover title missing / Le titre de couverture manque I I Coloured maps / Cartes geographiques en couleur □ Coloured ink (i.e. other than blue or black) / Encre de couleur (i.e. autre qua bleue ou noire) □ Coloured plates and/or illustrations / Planches et/ou illustrations en couleur Dound with other material / Relie avec d'autres documents Only edition available / Seule edition disponible Tight binding may cause shadows or distortion along interior margin / La reliure serree peut causer ce I'ombre ou de la distorsion le long ce la rr.arce interieure. Blank leaves added during restorations may appear within the text. Whenever possible, these have been omitted from filming / Use peut que certaines paces blanches ajoutees lors d'une restaurat;cn apparaissent dans le texte, mais, lorsque cela e'c't possible, ces pages n'ont pas ete filmees. D I institut a microfilme le meilleur exemplaire qu'il lui a ete possible de se procurer. Les details de cet exem- plaire qui sont peut-etre uniques du point de vue bibli- ographique, qui peuvent modifier une image reproduite, ou qui peuvent exiger une modification dans la metho- de normale de filmage sont indiques ci-dessous. Coloured pages / Pages de couleur I I Pages damaged/ Pages endommagees D Pages restored and/or laminated / Pages rectaurees et/ou pelliculees r~^ Pages discoloured, stained or foxed / I — I Pages decolorees, tachetees ou piqu^es ca D D D □ [3 Pages detached / Pages detachees Showthrough / Transparence Quality of print varies / Qualite inegale de I'impression Includes supplementary material / Comprend du maU ' il supplementaire Pages wholly or partially obscured by errata slips, tissues, etc., have been refilmed to ensure the best possible image / Les pages totalement ou partiellement obscurcies par un feuillet d'errata, une pelure, etc., ont ete filmees a nouveau de fafon a obtenir la meilleure image possible. Opposing pages with varying colouration or discolourations are filmed twice to ensure the best possible image / Les pages s'opposant ayant des colorations variables ou des decolorations sont filmees deux fois afin d'obtenir la meilleure image possible. Additional comments / Commentaires supplementaires: Continuous pagination. This item is filmed at the reduction ratio checked below / Ce document est lilme au taux de reduction indique ci-desEcus. lOx 14x 18x 22x 26x 30x 1 1 1 12x 16x ^Ox 24 X 28x 32x The copy filmed here has been reproduced thanks to the generosity of: Ecolc polytechnique, Universite dc Montreal, Bibl iotheque The images appearing here are the best quality possible considering the condition and legibility of the original copy and in keeping with the filming contract specifications. L'exemplaire fiimd fut reproduit grace A la g6n6rosit6 de: *• Ecole polytechnique, Universite Je Montreal, Bibl iotheque Les images suivantes ont 6l6 reproduites avec le plus grand soin, compte tenu de la condition et de la nertet6 da l'exemplaire filmd, et en conformity avec les conditions du contrat de filmage. Original copies in printed paper covers are filmed beginning with the front cover and ending on the last page with a printed o' illustrated impres- sion, or the back cover when appropriate. All other original copies are filmed beginning on the first page with a printed or illustrated impres- sion, and ending on the last page with a printed or illustrated impression. The last recorded frame on each microfiche shall contain the symbol — ^ (meaning "CON- TINUED"), or the symbol V (meaning "END"), wK >:hever applies. Les exemplaires originaux dont la couverturo en papier est imprimAe sont film6s en commencant par le premier plat et en termmant soil par la dernidre page qui comporte une empreinte d'impression ou d'illustration, soit par ie second plat, selon le cas. Tous les autres exemplaires originaux sont filmis en commenqant par la premiAre page qui comporte une empreinte d'impression ou d'illustration et en terminant par la dernidre page qui comporte une telle empreinte. Un des symboles suivants apparaitra sur la derniire image de chaque microfiche, selon le cas: le symbole — *• signifie "A SUIVRE", le symbole V signifie "FIN ". Maps, plates, charts, etc., may be filmed at different reduction ratios. Those too large to ba entirely included in one exposure are filmed beginning in the upper left hand corner, left to right and top to bottom, as many frames as required. The following diagrams illustrate the method: Les cartes, planches, tableaux, etc., peuvent etre film^s i des taux de reduction diff^rents. Lorsque le document est trop grand pour etre reproduit en un seul clich6, il est film6 i partir da Tangle sup^rieur gauche, de gauche A droite. et da haut en bas, en prenant ie nombre d'imagos nicessaire. Les diagrammes suivants illustrent la mdthode. 1 2 3 1 2 3 4 5 6 MICROCOPY RESOIUTION TEST CHART ANSI ti'-Li isei Its' (.HART N,, ^ IM 1.0 I.I . 112 IM [ 2.0 1.8 1.25 1-4 IIIIII.6 ^ /1PPLIED IIVMGE \"'\ MO- i'riw.ic\i'i()\.s I )( )M IXIOX OBSERXAFORV I >l I AW \. (■ WAD A \'-l. I\, N . is ■|iii. M \\ >i m; i\ Till; ( (iwn;! 1 \-ii(.\ .\(iin.\ I'.i \\ , i: II \l;i'i,!;, m \ 'I'lic ti !''iira;iliii- aiiiini iliccniflil ,.1' ;i IK \v -t:ii' in .\.|ilil;i «;is icci-iviit l^ir >,n Jiim. I). I '' i ^. :ilM I ' uiniMilliiralrd !<) t !ic W I ill',- I ill t lii> all lllrllli Mil ,:f I'll,. <;,,,„. ||.,t,,, ], i\ a- rliiiiilx lidvthi- 1' iMii~ ,•',('111111: w lull i,i" -lar v\a- ili-'i.\ m i| li .1.- tlic rnllf.! Mai'-, ! haiiv (.li.ir\t r- III Ijiiii]),' and I'-, iiiii . iMriiiiial' • I pri.jM rii,,ii ,.| tl>" liiilit- liiiiiiiLi i! 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A littu-t kiliru-l _'..: v, liil,' iiiaxiina Irll .•tii.;iii i .In! ui'iu-' •_', , ti :ii-i s. ;ii-l 1^ and ■va'j:'- iii'ii'iil li ''iiu, I 1 il'i\ - :niil ll II' laiii;,' m| 1 aMatiiin a". ml (I (i ■ , 'I'l iiMi" iTi|ii:i-ci| l.ir ill!' -:ar In p.a — i' 11 niiiiiiiiuin !., a i;ia\ii!,mii \\a- mi ll ih- ;'.->-n-iliinl- iKn ti MI'n'i Inr 1 1 tn t III ii'i'in a ii.aMiiiuiii to thi' n. \\ iniiiiuini ■pliriil \a!'i,-i!i|i'- al'r al-n rl;,'ir:ii-'i'l'i/i''l li\- ;i ii H" rapid ri-i' i!i;iii d rrniir a!li| till- CAl MT 403 P04-18 l.',j)l 1 tCUU WKltCHm^Ut BlBUOIHL'JUl •J lid I'l r.i.n \ii"N.- "I iiir iM.\iiMii\ "ir.~i i!\ \ l"l:^ II -linlll.l al-.i .■I- l;il :i~ irr:, -.■,,!' ilMC rcsMiiMaliiv. wliil.. it -Ir.iiM li..i i. -i!;i,li-l. i,M,,M t„A n ' li.l.-- I.- imi,.- !.,■ II. ,!,•,! tiial III" plH.tiPuriipliif n-ioni- "I ilif -tar. wliirh (iivc il> !ii-l..i> Ikm 1. ISSS. >limv it t<. Iiiivc U'vn v;iri:il>lf over :i mmrc "I" at Ira-t -' ina^tniiU'l.-. 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In the tahle vhieh r.>!lo»..-. the rMurato< of iniRhtness were made l.y c, m- p:e inn the n.mi with Mirroundiir ^m i Im h n.apniludos as i^iven in llmmnl Anmilx, \ .,1. :,() To.' 111.- !!r-t t\\.» u\^r\^~. ..wu.paii-oii was made prineipaliy with \<'Hm an.l a .'..r- r,vil,,n-.!...iil.lliav..|..'eh made lor !!,.•. liff.-rcnt zenith ■': imiee-. i-.it sneh !,:i- n-i !H,ndnne. W l„ n il,.' -lar l.eean.e faint. ^r ii ^^a- p.."i!>!e i 'ai> ..I alwnit ti:.' -an;.- /hiii'i ,ii,,:,nr,.. r,,.!, 1., d..iii.rav-.ay v.ilh the n.v, ■ -ity ..f .■..uM.U-iinn iM- iinl'^r. '1 he -tar 1;. 'Id i,„„„l i,\ Ilaya'd (\AVlu. ( iI,. -, ;:t.,iy in !'i!llriin CCl wa n.iml \.'i\ r,,i,v.ni. iil in inakinu tl,.. .'-li,: ali. '.■- ni !,,idi.l \M • u the -la;- 1 .■.an;- lainln ll an ih- I'h u a^n^ tiidr ii i> en--i!.!,' |1 ai ,ii.r cMiii aM-ii- v,i ,.• \iliaiMi I.;, till' li^inl ii 'h'' --i"' •'■"■■ '' ...inui.'-ni aiv i..ih.' nMiili.aM. 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'.I 11 II 4-2 tJ I :■ f 4 4 4-4 at) 30 4;o 1 • r, :i-!i :i ii :; '.1 1 4 2 43 1-7 :!•!! 1 .-. 17 l!l ,>l .»arl M.-:,h- -II I 1 II J 1 .-, IS 1 :. 1 s I 1 ■ » '.I 1 II I II t II I II :( 7 I II 1 II I 1 10 10 I 1 II :i ■ '.> 10 ■.i '.I 10 I II 1 I ! ; I ."i I I Ml t J 11) 11 I J 4 :; 1 :! 1 li I li 17 1 :. t I ( :i 14 I li I l'> L't;2 I'Mll.KM |u\,^ Ml nil |),i\i|M,,\ uli>||;\ \i,,|;. ^ M\M> n I I -TIM \M s III M \i;\ni III (i| \,,\ \ \,_,i II I .^■,, j ,■„,„■/„,/,,/ •* v^ ■ r- -•i ! 5 \ - .- 'k^^J'.f.'- Ami!. •-••-• li Jl r, L'.'i It Ji; r. J7 1. ."1 i; III li ;i 1, 1 r. N l> (II, III r, 17 I. ■Jl I, ■J 2 It -' I li :;ii ,",!i I .m; T 11.' N ."i!l \'.> r< ■-.'I I ■ ■Jl :, " :;i "il \av 1 ■J Is ."l .",0 10 1(1 \hr. 1 1> III Is 17 Is Irl, 111 1(1 (II M:iT l:; ((■_> I'lpl* II .1 I I. I I. I r. I :. I t I :. I I. I s Is 1 s .'l II Id 1 (1 51 4-9 Is Is .'.11 .'ill .". 1 . i-iiH-iu ; Id Is 1 •! ' -^ 1 1 "i-l i; 1 '■. I r. s ' 1-111,1, l-ii„li II. I, l>, l.iirv I I, I r, I I I I 1 :, I .-, I .-, I .-. I II 17 ."i la ID 17 I'l'.lr, Hti'wurl \l. I 7 I 'I I '1 I 7 I i; I I I s ■7 (1 1 || s 1 ■ s I) ."1 II .*> 1 .1 , ■» r, 1 1 s t s '• (1 I \,l'l, ,1 "liilr niiiiic llir,,ii|;li llii^ iirr.s-'. "11 \l " >! \l: IN I III 1 M\>| I 1,1 \ I |,,\ \,;| ir \ 203 fl.p< 1 1 - I Oil t 1 ^ I 1 Nov M t _ 4- I 1 ! ! 11 — fi- —4 > 1 ( 'o^ ii » Si ° j \ A j 4 ., 1 y 1 \ c S. r ■-. ■^H — ■ 1 ^ --V-4 ^ L,— * i IS ^ \ o//\ \\ i S _ -«=^ " ^/H^ >1— t- L. ne 8 IE 28 1 July Ij 1 1;^ A..^ -* 1 TT't T ■ ^ K-lilMMl.-.l MM^r„||,„|,,s ,,f \,,va Aqiuhr \.. :i Tlir ^iHMtniin ui, Jiuio !l wa^ uf ;, .■u.il i.n.ou^ natiirv with hrnad !il)s„rpti„n liiuw diir I)ni.cii)ally t.. hydn.n,.... Tlio noxt ninht sli,m,.,l ilio cliMractcrisfi,. -....va" tvpc .,f ,,,,.,•- (nun, llic l)r(.a(l omis.si,,), l.an.l- appearing ami JMiiiir flanked ,,n tlieir violet ed,r,.s l.y pair^ of al.M.rplion lin,.<, Xunieroiis other ai.sorption lines were -hown, as niav he seen fnm, an a.To,npanyin« tal.le. Th,~ persisted tor a •■ouple of nights, when the eont inuoiis spee- Iniin w.ak.'.iedanilthefaintei'of theahsorptionlitieswereloM. With their di^ippeannee the en„»ion hand at \ tflJO l„.«an to make its api.earane... hein« fairlv notieeal.le on the I Itii and l-eeoininK eiiualiy prominent wit], th.^ h.vdronen emi>-ions hrfore the end of the I'H.nth, Tla. nehular emis>ion .V, (X .-,()()7) seems to showfirst about June IS The other nehuiimn l.an.is X 4(iS(;, x \m\ ami X 4'.»,V,l d.'veioped later in the order piven. X 4(;S(i l)emKs,.,-nat the miniminu June •_'!», it and X l:^t;:{ at minimum on Jidv 1 1, while X 4(t.-i!) developed a tew days lat.'r, though remainiim very weak till the end of'julv. Sinee then the light from the star has been alnioM wholly emi-sive in eharaeter. with the general temloney for the nebular and X 4tailed description is gi\-en later. In eonneetion with the vanati(,ns in brightness it mav be pointed out here that ex cry uuTease of brightness was aeeompanied by a n-turn of the eontinuous speetrum whieh in turn faded as the Mar dinunisju..! m brightness. This is similar to what 00701 — Ji .'f,l iMU II \ I iiiNs 111 I III i« i\ii\iM\ I .li-i i;\ \ mm '"•'■H'li'l 111 lllr (•.,-,■ ,,| thr Ni.\;l I'r-l-i'l I ' K I h :i~ | I ri I mil l.\ l'lnl,--.,| I 'li k .11 III:, "'"■" III' -I ■'! '! 'Ii:i' 'li'' -|"'''l''ll'i ■il ••' 'ii.lMliilllli \v:i- iHil.ii;!!' \\\n\r :il ;i iiiiiiiliiiiiii il wa- "|Miuli:ir. " \l;:i!1i ihc !ii|i:iMnii|-,,i .m ;ili ^i j ,t iwh !.,,ii.| .it ..I I ,\ IHIilKx ;,- m -miir \\,-i\ ;i-~i.i-i:ili-i| \Wlii ihi-f li^lil Miiiali.ii- Tlic ill l.iiU ail' ui\rii III llir tolliiwiiiu lalili'. I III \r.^i>l;ll |ii\ 11 w h \ I \ 1111,11 l>,i. |.,i> .liih. i; •• l^ •• I'l Jll " 'J"i •• Jli Jll .lulv .' Ill ■ 11 •• IJ ■■ l:; ■■ II ■ i:i ■• 17 Is •■ lit •• ■.'() " .'1 " I'l ■Jli " :;il •■ :ii \uii 1 l.i'iill-. I |,|„ ii i;,> 1070 |ik;j llllis iii'Mi 101 iS iir.v loTl In;.; 101,,, III.M lIHil II III J 107.-, II nil I07-, lOI'l II 11)1 lll.-,l ll»i7 in-.l 101,1 lii:,l lOlill lii.'il loiir. mir, III.-,; II Hi J 107.-. III Hi 107.-. 11 Hi.-, 107.-. Ill Hi 10.-, 1 tiii'i 10,-,, 1 KIMI 10.-, 1 Hllii ! lOI'.l lllllj 107li lor,.-, 1071 Illliv 1071 lor,-, 107:; liiii:: 1077 11 nil lil7ii loii; 1071 lOlis I07.-1 M.t iiiiiiini lIll('tl^|llt ^ tliiii.irk. HIM ,■ lil,-,'i laiiil. ihlTii-, \ i\ .lillii-,. \ M \ •!, Iiiiii,- 1 iiiin I" ■■; H'l'O II, hiiil, IniiH-, 111,1, 111, II,' <■,■lllrl■^« I iMN.riM lo.-,7 1 nil, J I l;,.| ,.li;, ,|ilt,|.. 1 H,.,l l,:„„| ,l,„i,i, i„« ,,ii,. rrll,lilliy 101s :il-,, Slii;lit lili'ak liiluc. n Ml, lj.'i ,1 I Ifi r.llnl. illlTilM-. I, .111(1 nils -^<|i,.rtril r'liini ililTiH,, li.in.l Niiiiiiw .liliiii ,l I, mill lo.-,l I lo.-,s n |,,i, „„. Ill,, .. M,,|,., ,|,,,m,,r N'li |iniiiiiiui.ri| ('• iiiii- |i,.-.ililr 111 mis, 10.-,:; Niii |,niii,,iiiir, ,1 \ 11 \ fiiirii, -,i-|ii ,1 ims V, n fiinii lo|-,-lii.-,j. 1,1, 1 1, ,litTii>,- mir,-io.-,j. li.,tli ihiTiiM. Ciiiiipariiin tlir ilata wltli ih. Iiiiii curve, it woiilil ;i|>|)car llial tlic haiiil m'ciii- In -liill ti. ihr rcil at a ininiiniun ami In the iippii-iic iliicctiuii iliiriiina iiia.xiiiuim, that is, tliat ■ liflriviit aliurpliuii liiirsnr-.iTii'-iitliiii'-ar"picsciil in I lie iwni'a.M's. Tlic rule tii pes not Imld ilflmitoly. Iiiit -(viii- to tit thr i-a-c imi-t nf tlic lime. Tlius, (luring the two ininiiua, .lune 2litu'_".)anil.luly Id to I.Mheiianii i~ In lie read from X -l(lti;ni)X4()7r),wliiIe at the inaxinmni, .Inly •_' to C, it i^ at ,\ Ki.-.l: to ,\ IOC, , .lulv !l seems toi.e.a transition date with the former iiaiii! aii-eiit and a new al X 4(Ms show iiifr. I'ormer iio\ a' have been eliaraeieri/ed l>v -omewhat -iiiiilar liehavioiir of thi- hand, and tiie cnmhiiied dat.a slioiijd e-tai)iish -ome delinite eonneetion hetween the qntintity and (luality of lijjht. nil M.w 'i\i! i\ nil < i>\vii i.i.MniN \i^i II \ 265 \Ic"l-urc- li.lM' lii( h Iii.mIi- II|hi|i till' |il:ili- to lIclfTMlillc till' i|i-|ilMriliii||l - t>i |il lull Imc- -" iiiiinriuii- jii-i Mtitr immmiihiiii lii illiMiirv mi .luiif '.' II li\ iIiuk i ■.-* well' iiTii){iii/c(l willimi! ililiiciilly iiinl ;i'--iiiiiiiiK lli.'it llic nil' i liiic -iiITitimI -.iiiiil. . . .!»- pl:i''''!ll<'!l!- It \\ :l~ till 111' I ill. 'it 'll'N' <"l||i| I"' 'l-rnliiil in llu' i IiIkmu i c| iltli'- n| rcl (mim mhIhIm, |):iil H-illalK tliM-c III' null ami I itaiiiiiln, a- lia- alriM'l\ Ixtii |iiiiiilii| mil li\ \iLiiii ami 111 III T-. Ill I lie |)irliiiiiiial\ \Milk I III' |)iiir mar X "ill 111 ami \ I'.iJJ \\ i ir i i iiiiir'iil-l\ a -1 ( I Mil 111 lirliiliii, lull w Ik'Ii llic ilcllriilf iiH'ii-iiin'- laini' In lie made it \\:i- rniiml I liat I lie rc-iill inn ili-plarrimiil ~ will' ili-(iiiilaiil I rmii llir n-iiliial- I ln' > urn ■el iim inal \ aliic- ..rr a~ ^;l\ iii III till' I'liiliiu inn lalilc, llir\ liiiiin ciiliaiHTil liiic- nf iruii. 'i'lic c nia.\ lie a few .Mniin iilnil ideal im I- in llir li-l a- t;i\ in. a~ in --niiic ia>c- cln-r |iaii~ iiiinli' ii\ crlai) nn mn |ilal('<. Till' lilii' \ l:ii:> liia\ lliil- III' lili'iiili'il \silli aiiollii I' riiliami'il litaiiiiiin liiir at X liil'i ainl till' rmnliiiii'il w a\ c-ii'iintli ~Iii'm1i| Iji' ii^nl, Init, in aiiv I'a-c lln' iiifaii nl llu' (li-|ila''i imiit > will nnt 111' iiiali'rialJN' alTi'cinl. 'I'Ih' lalili' lnllnwintj i- Inr the plalc- nt uiii- ninlit milv, .liilir 111. uiM'li III ililall In -liiiw I1I-.I what .'inrt'Ciiiclit cxi-iiil aimiiin llir ili~plaii niiiit- liir llic \aiiiiii- liii<'~. '{'Ill' iiH'a'-ui'i'> lor lln' ili-placcini'iil - mi nllicr dalr- lullnw latrr mi. 'llic cNpidiciit nl ininlini; tliciii a- xclocitic- i> ii-cil, lliminli it i< iinl implied that llic>c di-plai'ciiiciit~ arc iic('c--aril\ dm- tn vcldcilic'- nfmitrii-^liinn na-c-, nnicli lc-.~ to tlic \ cN icily 111' llic ^tar it-cir. \ '-iiinniai'v l'(illii\\< fur the ulhcr date-. The Nclucitio uiilaiiicd t'ur the ^liarj) calciiiin line-, // and A', >liu\v that uilliin the liinil~ ut' eirur they arc emi- 'M 22' di-lant I'ruiii the pnini ill the I'.i'axcM^ tnuard which the »nlar >\>tcm is mn\inn and, if we reimnc the cmiipmiciit due In this imitiuii, we lia\(' a velncity uf — 2'S km. JXT sccmid fur the iiu\ a w ith rcferciicc In tlio stellar system, su tluit we iiuiy cniisidcr it as apprnximately at rest with ri'ferencc tu the '-tellar -vslcni. .'(i(i I'll'.l.li \llii\,- t,\ liil iiiiMl\l,,\ M|i:-| |;\ \ idil'i I l\l, |)|>ri. \( I MIA I - I i\ ,11 \| Id |.,|^ "iiils r,.".i I'lJi 1 1:, 1>>JI .,.; 4.".M Ills i:>7J i:,r. i:.ii:; :i,;'i i:.ni 7i.li l.VU l.,'i t:.jj nti i.M.-, :,iis 1.-.IN i:,,-, i."iii lis t|s| lull iiKi '.i:.. HIT ss llill 'IJ7 l.l'I'l 'I I i:;'i:, -js.; y.w:, :.:, liC'.'iMir, l:'ijii w: l.!l;i ii:;i i:iiN (isi l.liiil 21 1 IJ'il iiiil r_'yi ..,:,-, l.'H. 'I'.r, IJ:;:! :;js ijji; 111 rji:, t,r,s iii;:; Ml liiTT ss.- III71 'itii ■miiii 7.'ir. ioi:i nrr. :i'i.'..; sj.", IsiU .".J7 l:llii i;:;l mil s',0 • ;'.i7ll 177 :;ss',i I,"il M.-:iIi«, llrdurl;,,!! In Sun Disphiii luiiil. , i:i. /. /. /■, -( /' T: !'■ -I' r / . / . r. 1 . v., i' ■/■' /■• /■ -I !'■ I r.-\i.. r r> !■'■ ■/■/ r, I'. .(■ .1 I ■ I ■ I ■ II II II II II s,V, I I, \ . I W I I l:;j 1 1_'. I I I 111 1 I : I ; 1 1.;.. li:, i 1 ;j'r 111'- ; 1 ; s I 1 I !l' Iijii I I, Ml 1 1';7 i.iij 1 17" 1 I ii. lis; i:.iii 1 ]:;•' ■ i"" i.;ii ii.'ij I 111,, I i,-,'i I i,-.i, 1 i.-.i 1 111 1 is,; I ;s7 M'lii I II.! I 1st. l,-.|ii nils 1171 l,;,-.ii l.llls 1 i.;i'i J HI :; -I IJ,", 'I \. I 11." I 1 1' I I li... 1 ;■■ I 111 I l: : 111' I Isil i.;si 1 111.. I ir.. 1 Is,; 1 l"i. I I ",' I I Is) I 111 I,;,-.:; i.;_'ii 1 1,..; s 111 :; I IJ:; .-, sri.'.ii :. \. I - I IJl i.;',ni I !,;'■ 1 |s.' 1 II'. I ii.ii 1 II I I rji I ir.i. l.MIJ 1 h . I I.M. I l:;s I l,-.7 1 l.-.l I ll.l. 1 17J I Is7 i:!s7 W I I I l.".s I l.;ii 1 .M II I 1 171 I I'ls l:;7l i:;i,". I :;7s III :; 1 ijr. 7 \rl, \\l. I l:;'i I I, Ml I l.;r, 1 l.iii |.:'iii ! Is:; 1 171 1 ll.l, 1 I'.'' I ls_' I 17i'. l:;s.-, l:;'.i; : i.;i.-7 HI :; I Ui. I 'rini<. t:;kinif the ini'.'iii ul' llir fmir. \vi> have i\ lino ili,s|ilar.-mciil In tlic \inlri .m .Imu. Hiili ciirrcspiiniliim In a M'lncilv nf I l'j:>i; km, 'I'lii^ ivpiv-mts a (lisplarriiKiil :ii // , III ■-':'. I atm aiiii-trim-. a.iii at //, ui' is'.t .■iiii;-triini-i. I lia\i' piirpoM.ly ^rparal.'^l llir li\(- liy.lrnjirii liiii'-, plarin.ii lliiaii al it ml III' till' aliii\-i' laliji'. a- tlirii ili-pLarmiiait - -I'cin tu In' 1(.~- than tlmsc nf ilic nirlallir lint's. iiii; M.w >r\K IN nil. c on.vikllation ac^i ila 2(i7 'I'lir (li-plarcinclll-. ri'hlUw '■> thr Mill, nl' llir lurl.'lllir Uui- ,'ll(ilir. ;iri' r(-| irct ivcl.V 1 1 10. 1 V^V^. 1 t ID aii;l I lu k'li., wliilr cu-iv-poii'liiiii limiP'- Inr the liyilniiicn liiii-s arc i:U:^ \'-i'tX. 1. ■)(■(» aii:l l:}7(lkiii.. an avrraniMlitTcivncc of 7'.l km.. ni- iiion' th:iii one aii«-tniiii unit. liven alliiwiii'.; ti'i- Ihr iiiircrlaiiity of ^cttiiii; on thc-c l)ni:ul liin--, tin- .li-ricp;incy .-ccius to lie real ami mii~t liavc -oiU'' jiliv-ical iulcrprcl.alioii. Uoidc- thr 11 lines in the aiio\r lalilc there ueiv otlief< nie!isnreil)le they are a- follo\\>. ■.II., J _' i.",ss :;s i:;7i '.'s fJJl 'I llT'i ii:; It::! JT i.irlliC'lil \ l:l(lni 111 ll.-.l L' 111.",.; '.IS H1J."> 'J'.l 11101 i; :;'.ii:; I'.i :i'.iiii 1 ( ';■ ■n-r, Ti Thr- t'orcjioiiiti mea-nreincnt- relate to the -ct of line- which -utfered the least dis[)lace- iiicnt. hut a- already -tated there were in >ieiieral two -et< of line- tor tho-c lines appearing nil the plates i,f the precedilifi eveiiiiiir. The di-placemeiit- of the other niemliers of the p.air are a- fiivcii in the followinfj; taMe. .".(Its iv.vi frjlll.', isci .'.J; llsl IIHI .i:;iiMi.;i tiiii -'111 ii'.iTil 177 :i!t:!;iN.'.'> I.I. m. lit /■. s.-,,-,l 1 1 \i\. \\i. MlMllS) liriluitilHl 111 Sun l)i-]iliiri'mi'lll \.l. \\i. l'22i< \ -•.'I'.n J-.M '• ■Jls;; JJIIi'. .J.J II, J'J~)''i \ -.'■J 1 1 J'J'J."' \ ■J Ins JJ 111 \ •-'■ill .'■JU ■J2-J1 \.l. \\t. -•i-';i.")' ■J nil •JJti.'ji ■JJdCi' -■JJ is -J + lo:i -2207 -9 • r -JJIJ II r 10 :•• JJiij:i -JJJIJ r 10 :; -JJt:i (I .S.'l.'iti c \\l \Vt. -22^5! i Jlf.j' 2210: i 2 111 'J i 221(1 i 22l;i i -220(1 1 -JJOS 1 • 10 .! -21'.IS-1 The me.an of these four dis])lacemeiits. - L'^dod, corresponds to a shift to the violet at y/jof :i''-S an^>troiiis, at //- of HI ■'.» an iH I III. lM>\i|\l(i\ nusi;i;\- \•|■(l|;^• .-I\1M\|;> (i."i .i r,7o Iiiii7 - '.'."i ; MioT 1 i.ls lii7'i ;; Mid'l :, li'H ir,i,7 .1 si'.IJ '1710 Ills J 1 Mils 1.; 7J:i Hiss J Mini 1 1 lil.'i ir.'.i.; ■J S(,J{| ■■ 1.". li."..' lHs7 ■J N...'l 17 ii:;o Hi'.i.", 'J st'»_M Is. -,'17 Kiss 1 MiJt •• is 1,11 - 170.-, 1 nil, Mu sr\i; i\ rm Ml\-n:l,l,\■n<|^ \(,ii ii \ 2(;',t Ml \.-l l;l.> 111 Mi\ \ \'ii II I, M' ■> ~.", i:; s;. 1 1 . s.'ii:. >:, I'l 1 v.-,.-,ll 1, -..".',1 , -.-..•, 1 1, ,\ \.| Wi \,1 W' \,1 w \.\ W' \ . 1 W 1 \ . 1 U 1 \ , 1 W 1 ,•,^l^ i.J'i r_"is ', IJ 1 1 - 1J7." 1 J^" iii'.v ; 1 JJ 1 '-■'; ; I'.JI n.'i |si,l .-,J7 i.;iii r.;il 1 . ;i I'j ' 1 .117 l:',ns [ IJM nil I'll 1 1 ; 1 7 ij'.iii : ij:;i '. IJ-.'ll 1 rj! Ill '. ij 1 1 ] _'i II . ', IJ.l'l ', )'j;;s '. ijHi : iim s'lii rj 17 ' 1 --'* 1 rjiii ' ij 1 1 .;m7ii 177 1 _'7i7 . l;;iiii ', "'-'■" 1 _'i '► 1 i.;i'i ;;^i;;:;- vj:, 1 ji 1' t ', rji.7 1 1 71, ' ,;sNi| I'll 117^ ; \\rli;!-lr,| - 1 '17 l.i rj."iii HI - rj I'.i 711 UK :ili \ rJ77 in in J.-. 111:1,". ! ■J7i't ■ '■''■' HI 'I.-. I J.'.O 10 HI ',1:. HI '1.' HI '.!.". 10 '1.-. Ciirv 11 I'l 11 17 II 17 (1 11 II ii'i II 1.: ti 1.1 II -.N 11 -.N 1 1 Js II. jv II t:; - IIJS II Js lla.liMl \,l.,.it\ - rjr.i; J r_':'.-. 1' r.i.i. 1 rj:.'| ."i IJ .1. 7 ij.'.'i .; :,()is ii.'!i t!)-.'lll.-| .lStil.VJ7 ■trisi-dis l.-.l'l Tilii UM-lOll •tllisiiii 1 1 via '.1711 .i;',um;:ii i;i()o -Jii 1-J!t4;{m I'JMI '.ll."i fjiCi :vjs lUi;^'^H tlOl vio :;'.i7iii77 ;!'.i:i:> vj:, U.iiihn.l tii>-:Mi \ , V, Ciiiv. 1!:h1m1 VcldilU \,l W 1 H.l 1 I :i77 l."s;', 1 .".s I l.",s:; ir.0.". l.'."."i \.'.'i7 l.".'i.". - 111.'.'. I.".'.l7 INI ■ II 11:; - oi:! -ir.ss s.-.i;i .1 \ , 1 w t iiii'.' 1 .".T.'i ir.l.". 11.17 ir.l.". l.'.'.C 1 .'. sj I.-.M. l.".7'i 1 i'.i;i Hiils l.'.T'.' Hill I 1 .".7.'. - Hint i.",'ii; II i^t\ n 1:; 1 .-.sv I S,.7. i. 171'.' ir.r.l I7nn ir.l." S.V'.S :. His.". li.7n 17.". I li."7 H.71 ■I" s sll II in II 1:; ir.71 ir.7.". I7nl lH'iu HI n HI n 1:; \i\^2 I \. I \ , 1 \\< 17r.r. 17IH 17.",".. 1 7-'-J 17:;:: in n in n _'s 1 7.'.". -4 17::.". I 171:; I 171.") ; 17.;.'. nj 7 ■;;n n 1.' II JS \,l- \\i I7r.;i I 171N! J I . . . 17i'.n 1 1771; ; -i7j;i ; 17.". I Ml 1. Ill II n:; II JS 171.-. r. _'7() i'l r.i.ii \ i iiiN- iM nil: dumimux iih>i uv \ idn'i' Ml \>l III -> ' i| \i i\ \ \i il II 1. \- I :|ii i.;i mil s'.d !i'':ili \-. \ ( "ill \- lt:nl. \i ,1 M, I.-, 17 1:. Ill W I 1711 \.l W. 17i._ I7i I I 1i.7n •. I h.r.7 I. ; |i,r,'i II : II I ! hi7l I I.I.J :. I I I II l.'i II :.' - \ 1 W I . h.i. ; • 1 li.7n :: i; liw.:; 7 r ir.r.r, ii'i II .'i:; II iij II •j> ^1.1 J M.IS si; I'l SliJII ,\ \.l w . \. 1 \\ ■ \ , 1 W • \\ w i:;iii i.:;i ir.Mi 1 1, - ll.s'l 1 11.77 7 llul ^'..i li'.7^ ^ 1 |i;m ,; 1 - |.>s II 1 h.^l 1 1 \\..|..|.i,..l III. :ill - li,7> ^11 h.v:; 7 li.vs l.ll - li.M .:i \ — J ^;'i 1 ■ 1 I.I 7. 1 II . \ II IIJ II ■ I'l II 117 II II.' Cuu 1 1 Js 1) 'S 1 1 Js 1 1 Js Ha.ll.u \VI.,.M|., -ir.M 1. - 1I.-7 ir.li:; 1 - llisl. li ■•I. J I \ . i , \< H.sl ll.NS I, II ti. II J ir.'.ii s V 1 '■ ' . \ . 1 W; - 1 is 1 I 1 n.si 1. III .s II ,1 1 1 I(.s7 '.( si.Jl \ . 1 W I . IMJI I) -28 1711.". () X isr.i l:;iii :i imi '.',i7!l 177 .-1 w .lilh \ . \ (■ 11 \ 1! . \.! W 1 JIJii Jl|s Jj:;l ;|i; ,;ii 'I .12 II .1 ; II 1.; s;, .1 W 1, \ Jl J 7ill ; , -. :;ii ' J ; '.!! ::ii II ml II 1 : - J '^ .11 "■ S-7J I. \.l ; \\ Jii.j J-IJ!* - J:irj Jojii .. i s sil II III II I.: \.l W I II III 111; \,l \\i \.l W I \r\ \\t. nil. M w .| \l; |\ 1 III I ii\>|| I I \ I |ii\ \'M II. "i 271 l)ITAII.i;l) li|S('C:-SI(>\ (i| Till. -iTcTiii M Uit(:ncut. tlu'iv wciv iikimv I(-. ,Mi.,.|.irii,m- Imii iin|M.M.-,ni .lrt,,i!~ -li..un ii; t!,r plat.- IU..1 >tnkii,n chnntir. t,M,k i-li.-r ihrnutilu-ul iIh- ^inHnuM tmn, Mnir tu tnnr. Thoc details and cLan^ir- a.v d.'alt v.illi in ih- lollcuin- .l.-r, ipl ,„n ul ihr -prctnnn a- M'ciiicd licrc Irtiin day Id day. ./ fVl.. Thr pl:,t,> ^lwm,..l a faulv >.n,nt n,„n„u.m- -p.-lnm. «uli ^'''-^I'';'''' l'^:;;;^ k 'i' l! ,^,'';"^!.',:;;;; &;::s;;;s.'|ts';;;;r;sn;i:;,'/;;::;;;^;^:;s5^ „„„■„,( ,-„nvsp,m.ln„; to a v,.|."iiy ..l apinoarl, ,.1 }-'\^"- ' ' " ,' " V. ;,,,.,1 . of .■M..T"ini; ll.c ai-i.la.v,„.i,t ..i ,,r,„>laU...M,f.lw.>tar..vn, „^s. „r> at ''''^ ^;';;; ';,;V, .^V'^/ ,':;,: 'V.'vrn I,,..,! ,1,:... «l.ai ;.:;;;^;'i':l::;;";^:;:\::r;:!f;q';;p,,.'i;^^^ ;.i;i;„;;:?;i;;n;h.;:n.;i;;ni,n,;;,si,,.,n.s,,n,,iys,. s .„.,«,.,.„, i,..,;„„~m,., ..>,.. tlii-.lal.' i- llial ::;c';r,;,;:;:::s;..';:;;.".:::i" : ^i'!:;:;;;x;: "c ,i:„ ,a„ .s; i,,. ;:., ( i.»>» -i -> ■■< n /„„./.W Tlu.,..,.-MunlKU,aslmv,.lM..on,..>nrn^.l»-n..l.vla.m.,n.lu.r.nnnuu,,~.|.,vn-m^^^^ | n;';';;;;;,',:'!'' .^.,;;;;nn.,n....,.,w.M.,,.HJ,h.ar.M,,is.,,. ,,,.yUa.^^ l„'„Il„.M.fth,MM.v, Tl.ro,l,.rluarnK,.,,lin.^sl,,nva.,.n.l..n,y.-lHH,l,,,n..n>,,v1n..,Mh,.r,..l,,.,h,.Ninl..,n.,,,b,, ,,f il„. pair, tlmuehllirrlTrit isn.it mi iiiaikrd as u. //,j. liy.lriip-n pair is a')(>ut I'^iliS iictfaiivi'. .a,-,,rpt,u,, lin,-l,av,.b.n,,,i,.fr«,Tn. nu,nl,..r, lM.n,«...,,t,,,..lpnn.apalU to ih.. pan- oi 1,, .l,..o,.,i 1,.,. -, ih. Ii,li.-,'.l lines, N.X "'111^, PIJI, l.-sl, pj:;;; an.l llu r,,|ri, ill! /\. ./ /;,/,, ■n„.,v w ,.,ns>.l,,-al.l,. of a ..l.anp. ..„ tl,.- .lal... Tl... ._-..-..„. l.a.aN ..i h..\r..^^ i^;,,'";.;: ^^ u' ,„ ^ ,,-: //, f A .;;'ls ,., X :i....o, s., thai .!..• .■.„..,-..? .1 .,.i-...n 1-,..!- an- ... .l.- .....a.al p.- n- ..I - .■■ !■.- 272 ''"'•'" ^11"'^^ "I Till IM,MIM,,N , I'.-l l;\ \hJ|;\ "I ■■il'-"l|.l|i,ii III,,., V', lil.l £:ri;:;;;,:r'-r,;;';,!:;:;;;:;::;!:!;,:::;';:;-vi .....i,.,,, .„,,,. , „,„_, '""■;""-'"^" -' > M ^■■' :.).::'; 'm.m:„:,, . ';,::';'■ '- '■ ■■ ■' '"-h: „ luV ::!;:: ::it;;:^, ;'::;Si,??:,H5:::3:H;:^^^ .0., iiii|v,,,, , 1, '"" " "^ iii'l. I"niir -oil,.- . ,1,,.,,, , , ' '" "" "II i'i''i'i itii' rih' I' 'I'l,,' I ; ' '■■'■' "- ■■■i.i.v - :„ V w.v, ,-, „„, ,„,. "-■^~ll, ,,,■ ■ ili'l ", """■'■ ll"V.. III. :ii,|„.., ,.,,,,.,,,,, 1 ,, ■'*'"-,•''.". 'I'i'l .\ 10 .,11,1 ,,,- I,, ^B Tin; M.u >T\i! i\ nil (uwiii.i.mkin \mi n \ L'7;i . IV. r, Villi I. iM'.ii|.'~ iilT ui.ichi ili> iiii.i ill.' (Mill iini.iu- -|>. I ii mil .11 n - \ i. .1. I , .lur ii nn'iM :i|i|. m nt Is imhi iimi' viinn' In iiiin-iriiiii- fiiiili.-r 1.1 llif ml \\i\r n n.ii !. n :il,-. .r|.i 1..11 nlmli .ui- ml., ii, I.' r, mi; lu.i .li-imnii'. I -iri|i» nl imii--ii.ii SllMlliil I mil .1111 l.ili> .ur -.-.11 :il .\,\ l.■.^l, I'.l'l. l,".."l, I I'll ;,i..l :. -'ll|. I1...11 \ I ll.l. 1.. \ I 1 !.". I.iiiiihil. il l.\ :ill :ili-.ir|ii Mil liMii.l or -.11.- ..I' ali-..r|il i.iii Inn- 'I'li.' . \ii. 111. 1 1- ..!' //._ :m.| tli. n. I.iil n \ i::ii ; .■iiii.-i..n- ,ir.- ti..iii ,\ rilii 1.1 K l:is.'i an. I jr.- i',iiii\ wi'll ilrtin..!, 'I'll, -in.im i.'.rii..ii 1- Im.ih ,\ I l.!"i 1.1 \ |.;i..;, li'ii ilii- 11-. Il 1- r,ii.ii ini.. .■. iiir:ill\ l.y ah^.irplioTi Inn -. //,, :iii.| //, li.n . 1 li.- ii-.i .1 liii.ii - Tlin- ili.' .iin-- i.iii liaii.l- ..I li\ .li..u. n. 1 h. n « i.hl.- lil i.i .',i| aiin-lriMin all.! 1. iimliK' |.i.i|i. .1 1 1. Ill il 1.1 I 11. ir V. asi'-l.iii;ili-, .■..nl inu.' i.. li.- 11. ir ili.- n.niii .1 |.. .-11 1..11- ..f 1 li. Iiii.- ./.././ /.;//., / ;//, ;-•" -DillVi- I1..111 pi,-..-.liii.^ m ihai -liai|. //., an.! // ,-, ali-..r|.i i.m Ini.- n.- -.■. n i., i |i.- m.,|. t ..1 ill.' I inl--liili- J-il'l i:il^ ('.iiilniii.iu- -|i. iiiuni >lr..ii!;.|-, A .|. . i.l.'.l [laii uf ali-.ir|iln.n liii.- al \ lOal ■■( ainl v lll.'.7 'i U1..1.I alisiirpti.in lin.'- Iiavr a|i|nari.l nia.liially .if lai.' a! ,\ l.'iTJ aii.l \ la.'i 1 'I'll.- -la.- fur lln' la-i f.-\v .-v.-nini;- lia- I..-. 11 .' or :i li-tiili^ .if a ni,i._'nmi.|r liri'^liirr than il ua- ..n.- u.-rk ai;.i ./.'-/ !\lh. 'I'll.- Iiii.- .\ lO.'il ..f ill.- pr. . .-.iiiii; iimlii 1- fami. \\ liil.- .\ lO.'iS 1- 11.1 — iim . nliii-l.s If //._ ah-..i pi 1..11 1- pl.-i-lll II I- \rv\ failil an. I .lltTil-.- .1 ,' , I'll',. C.iiil mil. Ill- -p.-ii Mini . I. -1-1. 1. -.11 \ u.-ak.-i- 'riii-M- an- in.li.-.ii i.,n- ..f iln- .\ 10.'. I an. I ,\ lO.'.s, l.iit 11..11.- ..1 111.- ,\ l-".'il anil .\ l."i7-'. lli..ii:!li 111.- .-.111I11111..11- -p'-i-iniiii 1- ..r -.illi.-ii-nl iiil.-n-ily 1.1 n-v. ,il lln-in. 'I'ln- ali-..i j.i i.m III!.-- I., iln- vi..l.-I ..f ill.- I;,\.|i.i..'.-ii .-nil — lull- all- nil — iiii; . niii.-h ./-/'/ :'i!l, 'rii.-ii- i- -iKiiiL-.-i :il.-..rpli..n fi.iiii ,\ l.'.T.". i.i ,\ l.'.l'i an 1 .-•ni — i..ii ai ,X ViS\ an.j .\ l."..N, nlii.l. .|...- n..i -li'.'-i .111 ilii- pi. Ill- .if lln- pi.-. -I- Inn.; iimlii ./ '/ ; '/s' ( ...111 iini.iti- -p.-.-ii mil w.-.k.-ii.-.j aii.l '-ini--i.)ii 1.--- iiiiil(.i In a> ali-iirpi 1..11 ll.l- i-ali-n iiil.i I lit-ir i-i-iii I.-- 'I'll.- -p.-i-l|-i|ln .if llil-.l.-ili- l-a i.-pli.-a ..f .Inn.- 'Jl'illi. uilli ill.- a.|.|ill..ii ..f III.- iii-lii|lal-.-lnl--l..li ,\ litl'i:!, » lil.-li jiiiii- . .11 I. . //. , an. I .-\i.-n.l- 1.1 ,\ i:ix-"i. J il / .',''., .' 'ilh, .''.'//. 'I'll.- n 1.1 in .-1 11!-- inn ai 11^^ 1- -..in.- ."ill :iiii;-i 1 . .in- w i.i.- -.- ii.-n .ml " i.-niralU li\- ali-. .rpi i..n i!iiii--i..n r.-v.-i-n 1- nn.n- nnilurni. .il!n-|-H 1-.- ..;.-li. ral f.-al ul-,-.- a- .111 iln- L'l-I ./'(/■/ ;./''..(;,'/ .;/./ Tin- m-lnilar .-1111-1. Ill- ai .\ .'lOo;. .\ I.Hi.l, an- al I . .|ii.illy liimlii wnli//, .-in.li.nl> -liulii|\ l.->- -. ) ilia II II J. Iiiiii--i.in I- .-,-.-11 1 1 nil'.- iinif. iriii iliaii iiimi.-.liai.-lv pi... Inn; .|ai.-- .1-1;;. /^( hi. - I.l.-iili.-al Willi -|«-i-Iriiiii ..f .Inly .'l-i Appi.ia.-hin;; ininimn.ni in Imili i-aans. .1 -.('/.v/ .■.Ir.l. .'-■,11,. .'Mh. .'!.//,, .'.//., .'.'(/'.: .^'. /./i/ii'.ir ,■(/(, .'l.-^l. !:ii,l. .liilh: (MnUir -kil, Slh, ;lsl; .\ii'iiiiliir .'n'l, I'llli rii.' plaii- of ili.--.- .lain- an- i|iiil(' -iinil.-ir in ui-iiiTal, ami (■oM-^i>t iiriiii-ipiilly of i-ini--ion I lain I.- a- iiivcn in tlm follouin.^ I.ililc. Siii.-c .-iliout I lie 'J Is! of .Inly tin- i-oniinno'is spci I nun lias pn-Ity wrll vaiiisln-. 1 ami what rlianpi-s liavr lak.'ii plan' aii' il.-i-iiN \ulhni lln- .-ini--i.tn Tin- in-liul.-ir i-ini--ions, .Vi ly, 10(17' ami \. i .\ lll.'i'.tt liavn on il..- wliolf siri-nj;! In-ni'.l .iiirnm I in- itn.-rval. Tin- i. n.l.'iu-y li.i- I..-1-11 f. n lln- ali-orpi i.m wiilim i In- riiiissioiis to bliuw i:-.-lf iiiiiic as ilcliiiilc liiii-s. .s^.M.M\l:^ i:.m!.<.^|ii\ .-i'i:( i i;r.\i .l^!.^ n in \(i\ i.\iiii:i; m l-'allil rlni--ion Sironii .-1111—1011 .V, l-'aim .■nii--ion l-'aiiil (•nii--ioii .V, llfl i-iiii — ion I'ainl .-llll--i.ill .•SI Ion;; . inis-ioii I'.uni . iiii--i'.ii ,\ i:;tl: Si lont; (-nii--io!i .in. I l-'ainl I inissiiiii //-, Ilo i-nii.-sion . i;.-.i \nil. I 1..I1;. i:.|.^i- .",(111 ('.-Ill 1.- •■i(i:!:i-7 ".(11 1 (1 .",( 100 1 .■.007 .' "lOOd 1 I'i77 7 MHlliO lli.VJ .-. I'rti .' 1.SS7 (1 iv;:; 1 IMiO .-, 0.; 1710 !l IC.7" Itit'tN S Icu 1 llilO li i:iS7-J l:;i;v i:i::i'i-7 i:;i.-. s ll'j:; J 107.". .". lO'.l'.l N Tlic t'lircuditiji liiiiil-^ were iniiiputcd I'rnin mca-mcs iiuulc tipon the i)lat('s. usiiift tlic llartiiiaiiii intcriKilatiim I'onnula. \:itiii'al!y nmrc m- l('^^ crnn' cxi.-its in tlic incasurcs. as tioinc of tlip edges are imt well deliiied. //,-, while fairly definite at the led edfje, is not .so at _'71 n 111,11' \ I ii i\-. Ill iiii; i)(i\ii\iii\ nit-.i,i:v \ iui;'i ''"■ ^ l"l''' ■ill'l '"U.-ll'l- llir rl..-,' ul llir iiilc I \;il -lair. I llir ciiliiv .liil — iiili lliiTc lir( o i|ilili' Weak. //-, (■aiiiiui lir (li--(„-iaic(| ii,,iii ilir ni'luilar |:;(i:< i'iiii--iuii. \l lime- an iii- I'lvaMMl iiil.iiMly i~-li.n\nal ,\ CulituX i:;.",s a- it due Id ii\ crlaiiiniiti. \ Mimlar ra-r i'\i-l- Willi llii' IlilO hainl. |Imiiiu;1i Mil .liil\ Jl-l aiul Aliuu-I Ul Ihr lu,, i'iiii~-i,,|i~ aiv ili'tiniti'ly -ci.arainl w ith (•cniiv. ai A lt;i_> an. I A Ki.Vi. Tlir A ,. A , ami //,, ( im-ioii- air I'aii-ly well ilclincd. Ii(i\vr\ rr. \\ iih // , il,,- mvair-i lariuv in lln' nii'a-nrc- tur cillicr liinii i- I s aliji-licni- w illi a pii.lialilr ciht (or il,,. mean ..! _' I |ilalr- ot lr» tlian n I anu-lnHii. and il would -I'laii l!ia! llir (li-plarcniriit lu liic \i(ii(t (i;' | aiiK-lrom caniioi uholK |j<' a' couniiMl luf hy crrur nf ini^aMiivniriii . |i dioiiM ]„• -taicd llial il- ccnlrr lur llir piTicd. .Iiinr 17 In , Inly 17 inrlii-i\c, ua-n | ans;-tnini- to the \iiilci Iml ih" limiN \\f\<- \,n\ inaily -u drlinii(l\ dcin nnnrd. ( 'iirirciion oi ronrM' lia- iiccii inailf fur ilic jn km. \('l(M'iiy ot appioach, // , i- in ilii' -ainc diivrlinii '_> ang-troiiw, l)nl il-<'cnlir liki\\i-c <'annol li.' -!■ di'linitcl\ i-lalili-hcd.' I'.cHdr- llic ali-oipiinn liiii -, licivafti-r -pokcii of a.- the liydroKcn line- iVoni llir larl ihal ihrir di-plaiTinml- from lluar ■nial iio-ition- arc |ir.iportional lo ilini ua\r- Iriiiitli-. the fiillouinn; aiv mca-iiivd on llic majorily of llir platc^ in llu- iuti'i\al. A liaiid 12 aiiKMi'oni- wide (cnlivd al ,\ I'.TI s i- aNo a fcaliiiv wliicli iiitcn^ilic^ a- liinc 'iiocrcd-. MM'liri ln\ 1 l\| ^ :.( II 7 i I l'.t:,l li |i;:;:i"> i:;s:; I i:i7_'i) i;i:i7 ■_' I'dJ :{ i:!:^7 I i j:, I t r.'i I 11 1 1 I .■) ■ s Ali-orptioii line- uciv al\\a\- pn-mi -omr li or 7 aiiii-iiom- p, ih,> violet of //,, // and //.-, diiriim llir inlrr\al (pioi.d. and licrainr iiiciva-in^ly l.cilcr driincij a- lime pro- •■I'fdrd. On llic a-imiplion Ihal I licy aiv diic lo liydronvn, ihcir di~|>laiTniciii- iihii-i llii' vi'loriiy idea ale a- .liiwii in llir lo|lovvin<; lalilc. 'I'lic ifiivcincnl among tlifm.-(d\ !•> ^^as all tliiit roiild In' dr-iicil. IH.-n. \( IMIA 1> ini(l;ii(,l,\ \l:sn|.Tl n .\ llM.s \.N W . n'lit J A\ I' Jii ■■ :;(! .4 ■ p Aiiu, 1 .. _,, " 2.-) I ■,■,!. l■t|^ \.-lnrll\ W.lulil i;... .1- Ms , .. .ji, i.-.(i Sip; 7 l.-.r, 1 .. .ji II.; 1 ■• JJ i:;'.i I ; ■■ :;ii 11.-. i ' 'il .1 iij 1 , ■• s li:i ■■ -M i:;i i; Nov, J 44(1 i 11 : " 10 14:i 111 IIJ ir.J 117 ltd till tt'i 1 1 117 444 4 444 1 li a is 9 iiilliflii — f— //- — r— 4640 tllllii I.I Ni.\:. \i|Uil;r Ni'. .; iii.t*- III li'im'li :it;i| -7 iiini'- III uiiiifi Illl M W -1 \lt IN 1 III. ' iiN-ll I l.\ri"N \W' Il.\ 'I'Ih' ni(':iii i-t -lino roni-|Miiitliim I'l :i ili>iil:iiiiiiciit a t at //. <<\ ti aiin~l rmii- u il li fill lr^|iul|ilitm v:illl('> fur ll,i aiwl //,, I II' -prri la -1 iwii all' III nil I 111' iiliiillial Ili'K.'lIU I'- ililaini'il li'liulliu i-i' llilri' ami lillir ti'iilh^ liiiir- an 'I'lii' lii-t iwii illu 1 lliiit\ -I'Mii t'lil'l ill unllh. 'I'lii'V -liiiu llir III1I--I cliaiai'lrii-lM- isp ~liati' till' laiii'l 1 Ikiiihi' lliat tmik plaii' in tin' Iti Imiil- "f ~u lirl with hIi- ll.Mi> lati- nil tl \ a iliral iii|» in w liii'li ^m' fiDiii mil' t\|ir In aimtlii 'Mil ami I'a I I'liaiii;! r\\ nil till' Hull, aii'l iiiaki'- niii' -i'.'|.tii-al nt a -trilar rla-~ all' li'ii In liiiiik nl iiiilliiiii- 1)1 \ral- licllli; l'''i|iMli li h r a ■-tar In |ia> Til lii-i'ii-- I'liilx llii |>inlialili' laii- t 111 i'~ III I III 11 iiiiii n|' iii'W ^tai-- ami till' \ at lull- ilirniic! that liaxi' lii'i'ii IHiI t'nrwanl tlnin Iiiih' In lliiic In r\|iialii lln'iii wnii III' il 111 plan' ill all lltirlr allrailx IrlinlliN . I' Inav In' pel Hill In! I akr mimic I'linipaii-nli-, ImUi'MT. Iirl w ri'li tlii- iin\ a ami nlluT ^Inkiiin mir-. iiliiailaiiv .\n\a .\iiiit;.i 1*^'.'-' \n\a I'nM'i il'.Mlj am 1 \n\a ( ii'llllllnlUIII r.llj' ami In pnllll iilll whi'irill ali>l> the nli-i'r\i'ii larl- I ■ 'I'lii- ii'iiinii 111' the -^ky ill uliii Il it niTlllTi'il i- imti'WnltllV \|"lll t'inlll llic lllllll ('lull- laiiil iiii\a liiiirui ri'i'i'iitly in spiral nclnila' llir> air all -ilualiii in llir plain' ut ihi' Milk> W a> . w Ih'I'' mat ui'ciir lliaii I'l-i'w lirii'. liT i- iiinic pliiilil'ul ami wlini' I'ulli^iun- v.mill lir iiiuir lik('l\ ti 'I'lii-- ua- a kimwii ~lar ami il irquin il al li'a^l thli'f ila>- In iiiricasc tn il-~ iiia\i- !- u uiiiii in l-r|i'ilit till' tlirulV, ailuplcci Ilia iiiiiiii li|:lit. 'I'll -tars, (if a cnlli-inn nnuiiinn Ix'twccii two piart'i'a ii\ \i-ar^ ajiu to accniint |ui- ncu Iv (lead vMiilils, fur accnrdinj: lu lliat tlicnrv a fi'w liniir- umi 111 -iiliiri' fur tlii'limlii's tliruiiuli itlicr w itii the I rciiicnil- llUs V('l(iciti('~ tli''V Ai'i a--iiim'il In pu.-sc: 'I'lic Dirci'tiir, Dr. Ottn KInt/, lia- ill' t! \r sll(:^r-tlnn tlial ^llli'i' (his was a kmiwii star if a cliaiitji' in proper inution can l)c -howii to have taken place in the star after the oiitlmrst, then some weight would lie lent to the cnlli-iuii Iheniy. It !■- duiihtfiil, however, if the iirevimis observations wen of sllllicient preci^intl tn delillitely :5i If we accept the iiieaslires nl ■ttle the matter, the sharj) // ami /\ line- oi calcium, wliich are jir sniiiahly rc\ cisal-, as lepiesen tiiiii the radial iiintinn uftli(> star then the three iin\a', I'eoei, (ieiiiinoruiii and this one in wlm Il tlie.-e line- ha\ e heell Wi 11 iiieasurahle, liaxc radial xelucilies which ale appruxiiiiately zero with reference to the stellar system. 4) '{'he strong continuous -pectrnm before niaxiniuni linlit wa- reached, while t"d fur by hifih ))ressur(>s, would more reasonably sunne-t that mhiic internal possibly aeconil cause was heating up the eore of the star. linht after it had reached its niaximuin would argue for superlicial dislurbances as would On the other hand, the rapid diniiiiiition in also the fact that the continuuu> ■trmii rapidlv faded and was replaced by one of nebular type, noticeable after a week and ([iiite stronp; in a month's time. (fy) The history of the star, since it was lirst ijhotopiaphcd :^l) years ago, shows it ti liiive been varying in light over two ni igiiitudes, and this might incline us to the id( that the causes operating in variable stars were pre: ipnt here also. Tlien the similarity if the oscillations, which look place in th(> light of the star diirinf^ July and .\ugust, to those occurring in ( 'epiieid vai'iables in which the lime fruni ininimiiiii to maxiiiiuiii i- shorter than from maximum to minimum should be noted, though the iioint should not be strained too far. It may be added, that all the better ob.-erved nova' -how these oscilUi- i inuS ill iillJ^iitrnJ.S.S. !7(i I'l i;i ii \ 1 I ""'" "' "I' l'"\l|\|M\ ,,1,-1 |;\ \|,,|,,, in:i\iniuii, l.rinlili,.-.- u,. Ii.n ,. ' '"' ' "' \..v., Vnnii., f tfrtiitMtriiiii \l .v. 1 ." Ui.hl, 1 1 , 1 \1. 1 ,1 •^ ,1 II .', 1 IIHI :,, l.itHI 1 .", 17 IJ.-,II I,, IT.-Ji \l.-..,l,l,.,„ v-^':'fi:^l:::;:::::,:i:;;:i:;;:;::,:::::::;:-::;;:;- ir:::^::.:::::,:;:,:-'::::;;;:::,':::::::::::^ ii|'"ii W ii-iim ~u,,ik , ,11 III,. ,„,.,., II,., II,.,.,..,,,, „.,... .,, I, .. , , ' ' .,, I , " "•' ' ■ ■""' ""'i''l'.'nii'''il,ii \ iii„,n i|„., .,rli,.,. ;:■;, '■'■ rr '- ' ■-"'■"' ■''"'''■■:::,,,,!'';,,:; " l"il|| r||ii--|ol| all'l .ill-,, ■Illy. ..ihI v,.| -urt,r,|,.,,|,.„.,.n„,„,_„„:|,.,ri,,i|„,„. ,,,i,v,|,,,i,,.„ "■'"i"'i "'■ li.iM' iiiiiii, n,ii~ nici:illi,. 111,,.. „|,i,.|| ; ■pl;ii','iii "'■'■liKi'f - II r\ ,,f ;| in; . :ili(i l.,„.k\,.|'- i,i|...| ,,|' '''■■111 '!"' Mil,,.,-. |„,i|| I,. IV,, „, ili'ii .■i|i[M.,.||. a- ipp'-ir ,•(- :ili~.,i|,ii,,|| .|,„„l ,„, , , . ., /"," ' -^^ ■■'^"■'■■"■l"nL' III. H,„ ,.„i,| nmiii.in m... a r„Mii„. '"■■"""•'"■'^"'■^"''•^"""'" "n.<>M.,„„n,.|„.ii .„.ii,.. .„...a,i., ,,„;:„. ,„.|,„|a. " " """"«'' ~l'="'" '"■'•'•"liliK .■Mliir^h,.,] IP a i--i.';i.-vua,.ii,,. 1,1,. p,.,,i I,,, .,,.,,,, ,,,,.^,,,,_^ ,^., ~.i„„u,iii„..; ;„„;.;; : 't --■'■• ;-i''i ••,..,.., „i: .1 .pp,.„a,.ii„ri,i,:.;,:;: :, ":;:;■''• ''■'— '-■-M,l,.a.llia,„r; ...i|-pl,.li«i,i«„.„,a:,....all^, ,a, :;;:,:;::;:;,;::' ;'':r- ' --" '^"-" .^^,,1 u.jL:i::. l.Mtrht-liii,. .,ar ua- .•,ppr,,a,-li,i,. ai„l i„,l n.,.,.,|,|„,- -i 1.. ,i; , I "'" I" ""■ -'iiiH' 'liiv,.||,,ii lu (i,.,nii„,n,|,i mikI I", ,■ ,.| I,,,, .1 , t: "",--- I- .:;;::;;:::;,:;:;;;:■,;:;;:,;' '■■■- .'iiii. w ::"""';':"""''"'^""^"'"'^' -"-l».l.:iM.,ni„,.a..un,l..rvani„K,..,n, IK <'.™:^::™"r;::: \ I ,■ 1 ■ , • P'-ili,,ii t,, tli,.,,ri/,. i,.jiar.iiii;i- tl,,. ,„.ijri,| ,,f ,„,„. .....^ '■' " -l'i>lHT..,.|,n.,la.p..,.,i„.|.a .ll-ihM,.. vaiial,!,. „..|,„la , I , - li' iicliiila i-c(iuiriiiji ;{7 rilK ShW HTAII |\ mi I I I I \ I i< \';l II \ lidiii- iA|Mi-iiii'. wlmli «li((\\« niiinct'iiii- haiiil!* iiiul liiic* llmt were pri'^'iii in riii;iiii »lin:i ■ 111 liiiiiii'r iii>\;f. Ill (III' iiii-atitiMic. \\v iii'f n'ii'l ii|l.llUilU (Mill il.il V nil aw a DfcriniM 1, I'tis. \'||^ ililili il irhilf iliiiiKJ tl.riiui/li till jifisn. A •.p.ctinKiaiii taken. lUId. .\laicli l.'l'.fj, ^Iiiiw- tin- iii-iMilar fiiiir«>i..ii^ \\ .VN)7 J. I'l.'i'* J iinl IMV2 ill thi^ onlffof iiitcn^iiy; the two fiiiiiicilia\iii« v.cll-ilctiiictl liiiiil« ami III in:: :i' ..iii IJ aim^tiniiis wide, while \ VMVJ was al>onl .'.11 anv.-troins wide with iil-il