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DEPARTMENT OF THE INTERIOR 
 CANADA 
 
 HOK. W. J. Roc». MiniM^ W. W. Coar, C.M.G., D.pW» Uir^UUr. 
 
 PUBLICATIONS 
 
 Dominion Observatory 
 
 ^<^^'^' 
 
 OTTAWA 
 
 W. F. KiMO, C.M.G., LL.D., Dirtdor. 
 
 Vol. I, No. 12 
 
 Radial Velocity of p Leonis 
 
 IT 
 
 W. £, HARPER, M.A. 
 
 ^ 
 
 OTTAWA 
 
 GOVBBNMKNT PbINTINQ BnBBAB 
 1014 
 
 CAl 
 
prniF PniY 
 
 Trr.HtilOUE BlBLlOTHtOUE 
 
'E BIBIIOTHEOUF 
 
 DEPARTMENT OF THE INTERIOR 
 CANADA 
 
 Hon W J. li.KHE, V/inuKT W. W (..iiv, C M G , Depu/y MiuUler. 
 
 PUBLICATIONS 
 
 
 \y 
 
 Dominion Observatory 
 
 OTTAWA 
 
 W. F. King, C.M.G., LL.D., Director. 
 
 Vol. I, No. 12 
 
 Radial Velocity of yc? Leonis 
 
 BY 
 
 W. E. HARPER, M.A. 
 
 O T T A:W A 
 
 GOVKBNMENT PrINTINI! RuUEAB 
 
 1914 
 
 62441 — 1 
 
p ? ^ 
 
H.\|)1A1. \l 1,(H ITV Ol p I.KOM.' 
 
 BY \V K. HAHI'KK. MA. 
 
 Tlii^ -tar ',>=l(l'' 'JT-.")'". ,5- ^.-\f -l',*', iili(iln:ir;,|ihii' inamiiimli' about ,'{ • 7 1 
 WHS aiiiiniiiii'i'il a- a -iirct rn-rnpir l)iiiai> liv ( ainiilirll in 1.. ' >• !<■. \<il. 
 \ . 171. Si\ I'latc- wi-rr --iMMiicii liy ilif i.irk (ili-rr\rrs. one carli in the 
 years I'JOL' :^ 1 t; 7 s. ( iiil-iilc of the 1'.HI7 plalr tlie raiiLir in \cl(icity of 
 the iiM'aMircs i> ti km. from f :<.") km. to ^ tl km. per >cc. 'I'Ir- 
 
 1907 plate puc I- ")N() km.* l'\ one iiieasiirc and - .'ilv 1 !>>■ aii:it]icr. 
 
 While the spectrum roulaiiis l.otli h,\(lro;i:eii ami helium lines, hein^ 
 classed as Bji. it is not such as will yield \er\- aeeuraie measures. One 
 feature di-^euvered here was that the /\ lin<' -\ :5'.t:i:5i ;:ave velocities more 
 negative than tho.-e nf the other lines to the extent of Mnue HO km. per 
 8P('. on the averafie. There was no reiiuhir run to I he-e dilTerences, i.r., 
 the hinh positives for the h\(lroi:en and helium lines did not necessarily 
 occur with the hifih positive for the A' line. 
 
 Sixty-five spectrograms were seciu-ed witli the -;in<:l(>-lirism camera, 
 dispersion of :5:M tenth-metres per nun. at //>. Thirty-one of these wore 
 on ^vvi\ 27. and the remainder on Seed 'JM I'.mulsion. the liiier-frrained 
 plates improving coiiMderahly the (piality of the A.' as well as of the other 
 linos. A few plates notalily 4;<:5ti and 177.') are of poor (|uality. Plate 
 427:? is peculiar. Taken inmiediately aftcT r->72 it shows two of the linos 
 as comiilex though they api)ear as sinjile on 4272. 
 
 At first all the linos that wen> at all measurahle wore used. After a 
 
 'Smro .l>i. «n., »ritt<n tho*. fi«urr» hav,- U. n ,h.n«. .1 m tl>o .rrats <n V..1 \ ... +43 .. ,u.d +3SS un.l the .tar hw 
 bpcn removed from their list o( spertroscopic binaries. 
 
 62441—2 
 
338 
 
 PfBI.I. 'ATKINS ny IMl. 1M,V,1S|..N nllsKIIV \ T. .1! Y. 
 
 ,.„nM,l,.r.M. nuM.l... of ,,l.t.> vvm- th.is im-asun-.l a M.l..Hi.m was ...ul. .1 
 
 thoH. In,.- ul,ui, n.,1 l.y th. r.-M.h,als fron> tl.. .n.-au ..f th.- ,.laU-. to 
 
 ,,.. „,.. ,,.M Tl„. follo...^ .■ij.l.t wen. thos. ...Ictcd an.l um.I .hrou^lx.ut. 
 Tlif K \w Nva- ahMiys kept s»'imrat«'. 
 
 LINKS rsi:i> IN P I.I.ONIS 
 
 
 
 T 
 
 mil 
 
 M.un 
 
 1 l.innii 
 
 \\ :iVl-lj'Il([tll 
 1 
 
 Ml 
 
 IMirinl. 
 
 Niim«Ti<»l 
 Hii-iitual. 
 
 .Si 
 
 .s.; 
 
 He 
 
 II, 
 
 4,"i«)7 '.»'>7 
 
 
 ■:i 
 
 9-2 km. 
 
 
 
 53 
 
 S-4 km. 
 
 U71 fi7f, 
 
 
 M 
 
 5« 
 
 5ft km. 
 7 3 km. 
 
 II , 
 
 11 t;i 'I'js 
 
 1101 ■>'«! 
 
 
 47 
 
 5rt 
 
 fi km 
 
 "■■> km. 
 7 km 
 
 Hr 
 
 4i)Jii :;.'.- 
 
 
 60 
 
 rt 5 km. 
 
 Mean 
 \llEi-l>r»ii! 
 Krxiiliml. 
 
 - 1-4 km 
 
 - 2-3 km 
 + 0-4 km 
 _ 4 km 
 + 1-8 km 
 
 - I 8 km 
 + 17 km 
 
 - 2 km 
 
KMtlAL VEUMITY (iK p LFONIS. 
 
 339 
 
 MK.W<rREa Ul- p IltiNlS 
 
 4:>(j7 
 
 45.".J 
 4471 
 
 4:;n>> 
 
 II i: 
 tmi 
 -iiiji. 
 
 V, 
 
 V, 
 
 Curv 
 
 Velocitv 
 
 :i:iii 
 
 V.I Wi 
 
 541 
 Mf. 
 fi2 3 
 
 52 
 
 53 2 
 50 2 
 42-7 
 
 - 10 '.w 
 
 7U0 
 
 51 H; 
 ft7:ti 
 :■() 1 
 
 58'1| 
 88-7 
 
 \.l W I 
 
 + 82 
 
 \ . 1 \V 1 
 
 + (■.:! .-,'.1 
 
 - ir, ,-)7 
 II-' 
 
 ■.I', III 
 •1 111 
 
 I.I I 
 
 5.">fi| 
 
 M 2 U 
 
 02 -2; 1 
 
 62- 1| I 
 
 53H' I 
 
 1.1. III! 
 
 ■J.-, :it 
 ii'i 
 
 10 4 
 
 \ . I W 1 
 
 •Mir, 
 
 3942 
 
 Ul 
 
 \\l 
 
 15 2 I 
 14 5 
 10 4 
 
 IT 7 
 
 II II 
 
 S 4 1 
 21 HJ 1 
 
 I'.i 
 
 i; 
 
 27 l* 1 
 21 1; 1 
 
 III 
 ■2X 
 
 OH ) 
 
 25-3 i 
 14 rt 1 
 
 ■-M '.1 1 
 
 I'll .( i 
 
 ;to ^ i 
 
 ■JIM. 1 
 
 I- ^11 tw 
 
 + I'J 12 
 
 ■12 
 
 •28 
 
 31J 4 
 
 6'.i441— 2i 
 
340 
 
 iniU.irvTK.NS OK TIIK noMINION OBSK.HVATOIiY. 
 
 MFASnU'.S CI' p \,\:t)\\fi -Continuni. 
 
 AMI 
 
 4:.:.J 
 
 4171 
 
 4;i^^ 
 4.i|l) 
 
 4u;i 
 
 4ir,l 
 W2t\ 
 
 V, 
 
 V, 
 
 Curv 
 
 VpI. I W 1 V, I 
 
 ,t \. 
 
 \Sl 
 
 . 1," n 1 
 
 .-, 1 \ 
 :> 1 
 y. 1 
 
 :,i; 1 ; 
 .•,j J 1 
 
 41 .•> 
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 :•,! '< 
 
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 \ 
 
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 Kiuiml 
 Vdooity 
 
 
 ^ 4I-. Jl 
 + 1 -M 
 _ ll'l 
 
 4T 1 
 
 :;•' ;'iii 
 1 ;>:i 
 
 (HI 
 
 . is T-i 
 
 - J '11 
 
 i;i 
 
 — 'JS 
 
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 :ii " I 
 1(1 II ; 
 :i'i 1 : 
 
 ;;t (1 1 
 in : 
 
 
 4iis:i 
 
 Vil wt. 
 
 :,(■, 'I 1 
 IS ■_• 1 
 
 (IT 
 
 4 'I, 
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 41 I i 
 
 .'id T i 
 
 i.l (. i 
 
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 ■i.'. 4 1 
 
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 r> ii:{ 
 
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HADIAI. VKI.driTV >n p I.^■.')^•I^^. 
 
 341 
 
 MKASIHKS (IK p l.KuNIS 
 
 uiUnufd, 
 
 4:,.VJ 
 ■1171 
 
 4;iii> 
 41 i:i 
 41III 
 
 4111,-, 
 
 V.'l 
 
 V.-l 
 
 \\1 
 
 1^ 1 
 
 .-,.1 '. i 
 
 4n.:il 
 
 •- "i 
 
 -' ' 
 
 . (1 
 
 11 : 
 
 WciRhtlMl 
 
 
 
 
 
 IUf'UIl 
 
 -i- 
 
 .-,r.s:i 
 
 + 
 
 ".J 111 
 
 V, 
 
 - 
 
 s • :.:i 
 
 - 
 
 '.(•'.*( 
 
 V, 
 
 - 
 
 ■JO 
 
 '- 
 
 •i:l 
 
 Curv. 
 
 
 2S 
 
 
 •■js 
 
 Ua.ll:il 
 
 
 
 
 
 Vi-ld.ity 
 
 + 
 
 47 S 
 
 ^- 
 
 41 7 
 
 41 1:, 
 
 V.'l 
 
 \\i 
 
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 4'i 7 
 (111 '.I 
 4,-, :i 1 
 Is J 
 4! 7 1 
 
 4:i-4 
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 i;>'> I) 1 
 
 ii;i ',1 
 
 (- .-|S 111 
 
 - l.V.M 
 
 ■ 2:i 
 
 — -'Js 
 
 1- V2 2 
 
 Vfl. 
 
 li'i 
 r.l 
 I17 
 .'i.'i 
 
 :i'.i 
 
 411 
 72 I' 
 
 21 (Kl 
 
 IIS 
 
 ■2S 
 
 35 9 
 
 rjii,i 
 
 \.'i. 
 
 4',i li ; 
 
 ri7 :; 1 
 
 li'i II 1 
 
 4'i7 ; 
 
 lie, !■. I 
 
 V.l. 
 
 ■^ 111 (10 
 
 - 22 IVi 
 
 - 17 
 
 - ■ 2S 
 
 + 3S-5 
 
 t- Till II 
 
 7;i',i 
 7;i-4 
 li.'i ."i 
 
 IKI 1 
 
 7'.i 1 
 
 f 7ii 7 1 
 
 + 72 -28 
 
 - 23 32 
 
 ■12 
 
 - 28 
 
 + 48^6 
 
 4212 
 
 V.'l 
 
 \Vt. 
 
 ■+■ 601! i 
 771' i 
 61 7 1 
 
 87^7 
 + o7^6| 
 
 + 6'.) 70 
 
 - 23 64 
 
 09 
 
 + 45^7 
 
342 
 
 ITIU.n AIIONS OK llli; UUMIMU.N UBSEHVATOKY. 
 
 MI..\>1 Hl.S Ol p LEoMS— L'unaiiuiii. 
 
 4Jt)7 
 
 4 ■>:.-: 
 
 4471 
 
 4:i^» 
 
 4U0 
 414.1 
 4101 
 40.Mi 
 
 w 
 
 iBi.t.a 
 
 
 ni'Mii 
 
 
 \ , 
 
 
 V, 
 
 
 C',i.-v. 
 
 R 
 
 v\<:A 
 
 Vel.M-ity 
 
 4-'J'.i 
 
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 .-,1 4 ; 
 
 \\T 
 
 V.'l Wi 
 
 V.l \Vi 
 
 ii;i 1.; 
 ■Jl 'JO 
 
 ^1 1 , 
 r.i; :, i 
 
 + 6M; i 
 
 '.rj s > 
 
 .-I I 1 
 
 IJiU 
 
 \\\ \\t 
 
 4J73 
 
 •17 
 
 4f) 4 
 
 + 66-7 i 
 
 Ml II i 
 77 N I 
 
 71 I'll 
 
 ■Jl 7^ 
 
 U 
 
 •2S 
 
 40 4 
 
 + (ITIi i 
 
 lit li i 
 
 + S-J-2, i 
 
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 t- (i.^ 70 
 
 - 27. -52 
 
 ■17 
 
 - 2S 
 
 -r 42 
 
 n7 2 ; 
 
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 sl'.l 1 
 
 74 1 i 
 
 7 1 :i 1 
 
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 t 71 1.-. 
 
 - 2l'i.(ll 
 
 10 
 
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 '.I'.l 6i J 
 
 1.2 i 
 
 '.11 li i 
 
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 ■14 
 ■28 
 
 -f 44. H -I- 50.9 
 
liADIAl. VKl.dl in OK p I.KONIS. 
 
 343 
 
 MllASnU.S nl' p l,i:t)MS Conlt.M'l. 
 
 ■l.-.i'.T 
 
 in.'.j 
 
 4t71 
 
 1 >•- 
 til.; 
 
 IIUI 
 
 lai'aii 
 V 
 
 V, 
 C'uiv 
 
 Ua.Uul 
 Vcloi-ity 
 
 r.:M 
 
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 1>1 
 
 \.l. W 
 
 + 
 
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 ■ tl.'i 
 
 _ 
 
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 11 
 
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 7;i ;i 
 
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 7:i (► 
 
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 ■ 
 
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 r til 
 
 ' 
 
 + 7.i 
 
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 _ -ty 
 
 ■J'.t 
 
 - 
 
 01 
 
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 ■ ■J> 
 
 \.\ w 
 
 oil : 
 
 :. 1 ;i i 
 
 11 -■ ;. 
 
 717 
 
 li! , I I \ 
 
 i:;o:i 
 
 \'\ 
 
 V,!. Wil Vc'l. I Wl 
 
 4:vji 
 
 V,l \Vt. 
 
 I'll I II ; 
 
 7:. I ! 
 
 iit7 i; 
 
 Is s I 
 
 IV I ^ 1 
 
 + a I 
 
 + 46 J I + ■le-s 
 
 C.s 
 
 + o.-i ■:7 
 
 r,o 
 
 - us '11 
 
 o:i 
 
 •JO 
 
 ^- MO 1 
 
 OS 1 
 
 ',i7i'> 1 
 
 7s II ; 
 
 7 J 7 1 
 
 r Til, 1 
 
 + si. 'I I 
 
 SO 1 1 
 
 7l:l 1 
 
 72.'.i 1 
 
 7,^).s 1 
 
 + 70-4 1 
 
 + 29-9 I + 3o9 
 
 SI). 00 
 
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 + T.vot 
 
 - 'JOIi.T 
 
 •14 
 
 - -'JS 
 
 + il 1 I + 40 2 
 
 r liT 
 
 i 
 
 01 
 
 1 
 
 1 
 
 SO s 
 
 1 
 
 10-,^0 
 
 i 
 
 72 'i 
 
 1 
 
 r 70 ■:i 
 
 I 
 
 -r SI 
 
 20 
 
 - 29 
 
 ;i9 
 
 — 
 
 15 
 
 _ 
 
 28 
 
 + Hi 
 
344 
 
 IM 
 
 lllU MldN- i>V niK DOMINION OllJ^KKV A I uia . 
 
 mi;a.-'IH1.> Hi (J i.i:oM> ronnuiud. 
 
 + 
 
 ■Jl '.' 
 
 i 
 
 
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 1 
 
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 "^ 
 
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 4- 10 
 
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 ^ 
 
 ^ 
 

 RADIAI. VKLOCITY I't' P i.^'^^l^- 
 
 :uj 
 
 MIvVSriiKS Ol' p I.i;()NIS— (.'o'l'iHiieJ- 
 
 / 
 
 4.'i07 
 4171 
 
 4;iss 
 
 .i:UO 
 
 111.; 
 
 1101 
 IDJii 
 
 1711 
 
 ■r.vi 
 
 47.. 1 
 
 4777) 
 
 Vfl \S 1 
 
 ;!7 II '. 
 
 17 J 1 
 i;i .; 1 
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 i\ 
 1 
 11 
 
 \'.l. Wi 
 
 17 1. 1 
 ■Jll 1' 
 
 V.'l. Wt I V.l 
 
 17>;! 
 
 Wtl Vi'l. Wil V, 
 
 W.iu'li'.-'l 
 
 111. '.Ill 
 
 V, 
 
 V, 
 
 C.irv 
 
 Radial 
 Veliicity 
 
 1 
 
 ■ji ;i 1 
 
 1 
 
 IS 1) 1 
 
 1 
 
 . M 1 1 
 
 
 
 + jr. i;i 
 
 + 1.; 
 
 ■J J 111 
 
 111 
 
 4- 4:i 
 
 Js ■-• 1 
 
 ■JJ I'. 1 
 
 :■:■: ■■■ I 
 
 i:. s 1 
 
 ■j.i :. 1 
 
 - .'.-, :ii 
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 4 01 
 
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 4sori 
 
 f 11 1 ; 
 
 'JO o 1 
 
 40 
 
 ■Ji'. 07 
 
 •J I .'■.; 
 • ■is 
 
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 :;i N 1 
 
 •JO - 
 
 Its 
 :;i 1 
 
 JO'S I 
 
 •04 
 
 ■J 1 :i 
 ;il :. 
 IJ 7 
 ■jr... 
 ■Jll .". 
 :>o 1 
 ■JO ■ J 
 Jji. 
 
 V.l. \M 
 
 r.o:. 
 ij J 
 
 j.i 1 
 
 10 1 
 l.i 
 
 + -j:! (IT 
 + 111- -J" 
 
 4- 10 
 
 + 45. 
 
 -^ 4:( 1 
 
 •JHf>0 
 
 17 'UU 
 
 O'J 
 
 ■■js 
 
 40 3 
 
34r) 
 
 rrni.ii\in>N>- i> 
 
 ), I ill, iiii\n\h'N I iH^i !:\ v Miiiv. 
 
 MKASrilKS OK ,> i.y.nSlS -Cinliniinl 
 
 43l'.7 
 1171 
 
 i.i--^ 
 4:; 111 
 411) 
 
 mil 
 4ujr> 
 
 Wcinliteil 
 
 iiu'an 
 
 V, 
 
 V, 
 
 Curv. 
 
 Raili:il 
 Velocity 
 
 \.l 
 
 ;'» 1 \ 
 '.-> 11 1 
 
 1 .-. 1 
 
 .11 7 
 
 1-J ^ 1 
 
 I 
 
 + m» '17 
 
 + 1 .-••;{.') 
 
 (10 
 
 ■J.", "II 
 
 l-.'-.'.7 
 
 + :!N-3 
 
 V,l. 
 
 \\l 
 
 V.'l 
 
 \Vt 
 
 ( :iori 1 
 
 ■JOS I 
 
 41) :i 1 
 
 ;i7 '.I 1 
 
 ■-•7 :i i: 
 
 .Ul'.i 1 
 
 ;i7 1 
 
 + 35-2, I 
 
 42-4 
 
 :!:( s 
 4r)-7 
 
 41 II 
 
 ■J.t II 
 Xi -.i 
 
 ii ."i7 
 
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 ■HI 1 
 
 II r. ; 
 
 III I 
 
 4J-7 1 
 40 -J \ 
 MU 1 
 ■)10 i 
 
 ;!9'J ! 
 
 1) III) 
 II 
 
 \.i 
 
 11 
 
 I'i 
 
 4S 
 
 '.1 1 
 
 1 
 
 III 
 
 s 1 
 
 I.-. 
 
 'J 1 
 
 7 1 
 
 \.l 
 
 47 1 
 
 II'. .M 
 I 71 
 
 ■2S 
 
 (U) 
 
 1 
 
 :!s 
 
 
 
 S 1 
 
 1 1 
 
 ■J*i 
 
 1 1 
 
 ■0 
 
 '•t2 
 
 4 1 
 
 III hll 
 
 ■J ^1 
 
 1.' 
 
HAUIAl, \ Kl.tx TIV IK p I.KONIS 
 
 :{47 
 
 MK\>riU;S ol' P I.i;i'NIS r.mlinwd. 
 
 4567 
 
 4:.52 
 4471 
 
 43HN 
 4'Ui' 
 11 t.i 
 11111 
 ■liijii 
 
 4>sT 
 
 t>'j:. 
 
 V,l Wt 
 
 + 4;t'.t 
 
 4',«ll 
 
 V,l \Vi V,.l. Wl 
 
 -.0 (. I 
 
 4,", 
 
 4:. 
 
 4.-. 
 10 
 
 I 1 
 
 l,,.j.i 
 
 Nil. \St V.l Wi 
 
 Weight 0.1 
 
 nii';iii 
 
 V, 
 
 V, 
 
 C'urv 
 
 Radial 
 
 Velocity 
 
 - 
 
 + .V.Mil 
 
 _ S s.'t 
 
 ■OJ 
 
 1, 1 
 (I 1 
 
 1 1 .'ir. 
 
 11 -•• 
 ■ ii'.i 
 ■■J^ 
 
 7ii :i 1 
 
 r.'.i -2 1 
 
 :.: '. 1 
 
 I.J i 1 
 
 1.1 (I I 
 
 1.,; I. t 
 i«i :. 1' 
 
 •M '.I : 
 
 :,•< 1 I 
 
 l.J 1. 1 
 
 I'l II I 
 
 I..) J 1 
 
 ('.!! II 1 
 
 \.l w 
 
 12 1'.' 
 
 .".:. 1 
 
 i'.ii .. I 
 ou 1 1 
 
 .-, . 1 
 u; II 
 
 1" 1 
 
 r.o 
 
 + 2'J 9 I + 5-'" 
 
 
 . _ 
 
 4- 111 ll'l 
 
 , 111 s;; 
 
 IHIJ 
 
 - 11 17 
 
 ■(HI 
 
 _ nj 
 
 — -'JS 
 
 ~ ~ 
 
 + 47-7 
 
 4'i.il 
 
 \..l \\T 
 
 ,',1 J 1 
 
 ,7 .' 1 
 
 ;ii .1 1 
 
 ■,l s 1 
 
 ;.■, :i 1 
 
 ■,j II 1 
 
 ,:, J 1 
 
 47 I 
 
 
 ,;! .-,1 
 
 V 
 
 HI 7t) 
 
 
 17 117 
 
 
 is -27 
 
 
 rj 
 
 
 (l() 
 
 
 ■-> 
 
 ^ 
 
 ■ ■js 
 
 -1- 
 
 3tj 1 
 
 + 
 
 4J-2 
 
MH 
 
 ri ni.ir \ I inN> (11 iHi: imimimdn iin>i,i;\ \ imiv. 
 
 MlASl IMS n| p l.i:i)NIH — Concluded. 
 
 4.V,7 
 4.V..: 
 4171 
 
 4:j>s 
 
 4;uo 
 4it:s 
 
 4101 
 
 40JI) 
 
 in<':in 
 V. 
 V,, 
 
 Curv. 
 
 Radial 
 Velocity 
 
 Vel. 
 
 Wt 
 
 MO 
 70 I 
 tM) I 
 tif (1 
 1-i -2 
 tiOli 
 
 (ill ;; 
 
 + (i'.Mi:, 
 
 - 20 17 
 
 + M 
 •■iS 
 
 1 III- 
 
 + V.) :i 
 
 \cl 
 
 f.i 
 
 0(1 
 
 711 
 
 \\i 
 
 tW 
 20 
 
 I 1 
 
 \,1 
 
 ■10 
 
 •2S 
 
 + II 
 
 V.l. 
 
 \\I. 
 
 71 '.'■■' 
 
 i.'2 01 
 
 I! 
 
 ■2S 
 
 I'.l 
 
 V.l, 
 
 \\1 
 
 \\i 
 
 \.l. Wt. 
 
HAIMAI, VKLUCllY Of p LLUMS. 
 
 840 
 
 .SIMMAK^ ol' MKASIKI.S t»i p 1.EUNI8. 
 
 Plate 
 
 N.inil.rr 
 
 l):if 
 
 .lilli:.n Dale 
 
 I.imi* 
 
 (liiicriil I iin*. 
 
 K I ilM 
 
 I 
 
 W.iiilii Voliirity. ' Weight. \ Velocity. 
 
 :i:iti 
 :wti;i 
 
 HIO.'i 
 
 :t.Hj.'. 
 
 i'iin 
 
 M:ir J^ 
 Al.ril 1 1 
 ApulJ'. 
 I)rf. 5. . 
 
 :i'.iu."i 
 3'.)4J 
 3977 
 40n» 
 4(r23 
 4IIIII 
 4l>|s 
 4(HJI 
 4(ls:t 
 410.-. 
 
 4r.'i 
 4i4:i 
 
 41H7 
 4197 
 4'J()3 
 4'J12 
 
 4'J-".> 
 4'2:il> 
 
 4-':fs 
 
 42.'>4 
 4204 
 
 4J7-' 
 4J7:i 
 4JX1 
 
 42>i» 
 4.;'.12 
 4:iO:i 
 4:mi>< 
 4:!i<t 
 
 41124 
 4330 
 4341 
 4349 
 46'!9 
 4711 
 4720 
 4741 
 
 \\ 
 
 s 
 
 Hi 
 
 2.S 
 
 fill 
 .1:1 '.I 
 
 .hin. II' 
 Jan. 30 
 I'd) 22. . 
 Fp1> 27. 
 
 M ir 2 
 M. 
 M;. 
 \Ur 
 
 M:l 
 
 Mm 
 M:i|- 
 April 11 
 April 14 
 April IS. 
 April 19. 
 Ai.r.rjl 
 \pril 1\ 
 
 \|.nl ■-•:; 
 
 April J.-. 
 ApnlJIl 
 .\l>ril -N 
 Nl^ril N 
 M:.v .<. 
 M:iy 4 , 
 M:iy .- 
 M;i> If. 
 M;iv HI 
 M ly 2.-. 
 .Miiy 26 
 May 30. 
 June 1. . 
 June 2... 
 Nov 16. 
 Dec. 3. 
 Pec. 6 . 
 [Dec 25.. 
 
 11^ Tl'i •'•O-i 
 7. VI r.l.-, 
 77:i li'.'.i 
 
 .'.':; 
 
 'I. on 
 
 (111-, sjs 
 (i.-,:i-xss 
 
 0I-.7 SOI 
 (HHl 7li2 
 O^i.-i 71rt 
 O.is 771 
 0',i>i 734 
 HI-.' 71ii 
 111! v(VJ 
 lin» 7S.-) 
 112 732 
 124 705 
 i;!S 032 
 141 l>S'> 
 
 14:) IMS 
 
 140 010 
 14S.036 
 148 0.-)0 
 ir>0 039 
 
 ir.2 .■>s3 
 i.^a (Wi 
 
 155 598 
 155 f>24 
 160 614 
 
 Ifil .'."3 
 
 102 .'.".0 
 17.3 -Olii 
 r...-.'-iM 
 lS2:i02 
 lS3ri.TO 
 1H7")77 
 189-571 
 100 -590 
 357-940 
 374-949 
 377 ^(12 
 390 -820 
 
 8 
 
 
 4 
 
 8 
 8 
 5 
 
 8 
 
 8 
 8 
 
 3 
 
 + -tJ 2 
 
 :{ 
 
 47 7 
 
 1 
 
 41 
 
 1 
 
 40 1 
 
 - 
 
 42 1 
 
 
 41 7 
 
 
 3'.i 4 
 
 
 4o 7 
 
 
 47 1 
 
 
 37-7 
 
 
 4,', 1 
 
 
 32 1 
 
 
 3H.4 
 
 
 48-2 
 
 
 47 8 
 
 
 11 7 
 
 
 IJ 1 
 
 
 ;'.') '.1 
 
 
 ;is ■ .' 
 
 
 4-- r. 
 
 
 38-5 
 
 
 40-4 
 
 to I 
 
 
 1,-. 1 
 
 Vl 7 
 
 
 41 s 
 
 
 40-2 
 
 
 111 3 
 
 M 1 
 
 21 1 
 30 
 
 I 
 
 
 36 
 
 s 
 
 33 
 
 2 
 
 .14 
 
 o 
 
 40 
 
 
 
 43 
 
 5 
 
 14 3 
 
 + 5-5 
 
 ! 
 
 1 
 
 1 
 121 
 
 -f 
 
 12 
 
 _ 
 
 1-H 
 
 + 
 
 14-3 
 
 + 
 
 4 
 
 I 
 
 + 
 
 10 
 
 + 
 
 8-1 
 
 4 
 
 15 
 
 
 S-4 
 
 + 
 
 119 
 
 , 
 
 .■i 
 
 ■1 
 
 110 
 
 + 
 
 6-8 
 
 + 
 
 28 -7 
 
 ■i- 
 
 4 5 
 
 + 
 
 22-5 
 
 + 
 
 10-7 
 
35n 
 
 n 111 K \ I iii\- 
 
 <>] I HI, iiii\ii\iM\ iPii-i.Kv \ mm . 
 
 .sIMMXHV UK MKASIKKS i>V p I.H'Mx <-nwh,<l I 
 
 Plalo 
 NiiniliiT. 
 
 Dat.' 
 
 Jiiluiii Dull' 
 
 fiCIMTul l.ilKV 
 
 K l.iiuv 
 
 Linn*. 
 
 Wnnht 
 
 Vrlfiritv 
 
 \\ c iitlit VHocity. 
 
 n>i-.' 
 
 47.VI 
 
 Jail 7 
 
 ■.Mi'.>.40!i s|l 
 
 7 
 
 47ft4 
 
 Jan. in 
 
 11J-7'.H'. 
 
 7 
 
 477.-. 
 
 Jan 11 
 
 4I3"(« 
 
 .< 
 
 47»3 
 
 Jan 1^ 
 
 414 SJO 
 
 s 
 
 470.i 
 
 Jan 1>. 
 
 41H 7711 
 
 s 
 
 4S0« 
 
 Jan \:> 
 
 4J1 yjs 
 
 s 
 
 4X14 
 
 Jan. 'J'l , 
 
 4'»7 WVi 
 
 s 
 
 4S24 
 
 J .n M 
 
 i:t:t 7J,-. 
 
 7 
 
 4SH7 
 
 M.. r.' 
 
 44". 7;w. 
 
 s 
 
 4S4.> 
 
 Ftl.. i:i. 
 
 till lift.". 
 
 7 
 
 •ISl» 
 
 1.-1.. M 
 
 117 (i'll 
 
 7 
 
 4M11 
 
 Fell. js.. 
 
 4liI-7lHi 
 
 7 
 
 4Sr.7 
 
 M.ir. 1 
 
 4C.:! 771 
 
 s 
 
 4SS7 
 
 Mar. i:i . .. 
 
 47'. ftl 1 
 
 7 
 
 4Mt.') 
 
 Mar. IS 
 
 4M) IV.I7 
 
 7 
 
 4!MH 
 
 M:ir JO 
 
 4SL>.tM4 
 
 / 
 
 4'. His 
 
 M:ir. ■.'.• 
 
 4M tVJ2 
 
 7 
 
 4!I|IS 
 
 Mar. ■.'.-. 
 
 4S7 (illi 
 
 . 
 
 4'.l2'.t 
 
 Mar. :tl , 
 
 t'.i:tfts:t 
 
 s 
 
 4>J34 
 
 .\piil 3 
 
 4'Jti (141 
 
 7 
 
 4»41 
 
 April 8 
 
 .TO in 10 
 
 7 
 
 4W6 
 
 April !t 
 
 iKtyyj 
 
 7 
 
 4959 
 
 .\pril 13 
 
 .108 (MO 
 
 ■i 
 
 44.'. 
 
 i 
 
 + 
 
 14 5 
 
 in 7 
 
 1 
 
 4- 
 
 II 3 
 
 4tl'.t ? 
 
 
 
 
 1.-. 7 
 
 1 
 
 , 
 
 I'l ■> 
 
 4:M 
 
 
 
 
 40 ;t 
 
 , 
 
 
 1-' 2 
 
 40 n 
 
 ^ 
 
 
 lii s 
 
 :iH a 
 
 4 
 
 i 
 
 .1 7 
 
 10 1 
 
 
 
 
 ij t 
 
 «- 1 
 
 ' 
 
 
 Id :i 
 
 ■1(1 
 
 11 .-. 
 
 1 
 
 
 T) .'i 
 
 37 4 
 
 
 
 (13 
 
 .W 
 
 
 
 
 2<l-9 
 
 
 
 1 1 
 
 .VJ 7 
 47 7 
 
 1 
 
 t' 
 
 1 1 
 
 47 1 
 
 i . 
 
 •F 
 
 22 3 
 
 :iii 1 
 
 i 
 
 + 
 
 10 It 
 
 42 J 
 
 J 
 
 + 
 
 10 5 
 
 4(1 3 
 
 I 
 
 -u 
 
 1 1 
 
 14 7 
 
 i 
 
 T- 
 
 f.-H 
 
 I'.i (1 
 
 
 
 
,;m)IM. vi:i.<h m -u p i.K'>m>- 
 
 351 
 
 . • ■ «l 'I'lic tilCil-lin'S i>l III' li\illi>-'n .Ml. 
 
 ,1,.,, ♦I,,. v,.nati..i. IS P'al. Ill* iiK.iiii ., ..,.;i„.,1 
 
 •"•'■ ■ •' ... ■ 1 ... ^. It I 111-; II i:i\ !"■''''■" '• 
 
 •jOUm. to + .V»km.. l.u. -niroM.i.^ ^K.^ 
 
 ic mcasiirr- iall :ii 
 , ,1,:,, ihr ^tnr xvn^ "i ,-..nM;n.. vlurily 
 
 +/,.{. 2 kvi. ± ■>■ 'i '"' 
 
 .„. „p,l,:,i,li- .-rn.v of • :!■» 1^>"- i"* "" 
 
 ,l,nu :i .-Mlr.r |-,uni + •>•' - .....aM.n- fall anui.,-! • H 
 
 .,,,,, „,,,,. TIk- vasi majority <-! tli'' nxaMir 
 to ;irclilililal I'l lor. ' •" , ■... 
 
 U, + 1.-, anil il v>'' ^^"■'' "• '■"""'"'' 
 
 .„vatcr llia:i 'tiai ol'taimi 
 
 , :,:.^. - ^'■■« 7 ■::•:;■,;:::';: :"::::: 
 
 IC'l 
 lilt 
 
 m1"i1'.^ Tin. K IINI-"- 
 
 „ , ,. ,„,„. i„ stars u!i.-:v ,hi^ .hava-Ln^.i.' iliiT-n.nn- of 
 
 ''■''•• " ^""' '' '"■ " ,,. , i,„ -,i.l nl- tiii^Mar allliiHr^li 
 
 v.M^-1.^ -s an. u..aU>- Shan.. '''-;;'''-;,;,, ,„ , 
 
 1-1 V vuAvVnr- < >nr WhmIiI ln' H" " 
 linnraraliri' ulU'li 's U!l(lil-0(.. , , • , 
 
 , ,,|r.,,i,.,,|lv to -how ilrlini'i'l.v 
 
 1 .■ .. . 1 . 1, ,,,,,. I. n :llli 
 
 ,.,1 to Ml>l>rcl two -licrtra 
 ih,' two I'nini'oiifnts. 
 
 Tl,o >»»■.«■--" «•""■! '"'•"■" ""■''"'""'■ ""'" ""■" 
 
 ■n. v-„„/-v.,.. .-n*,,,....uv,. ,..:,. 
 
 ^,„ -n. ,-,,„ ™n,. i. ,-i..'i> ""■'«'•'> '■- "■■"■ ""■ 
 
 assuiniHii.H that it- \ii<"i<.^ , , 
 
 Tbo paper may ho MU.n,i..l up a< follows: 
 
 •_>S 
 Oil th(> 
 
 (1) Mca-ufi's "11 
 
 ,-, nhitcs of thr star sho^v a stnall r 
 
 aiijic in radial 
 
 ,.,,,„^., „...ihlv .. k-n. -nu.n- an. ...li-.... of .nnploxtty. 
 ,0. Tho K lino volooity diffors fron. that of tho other lino 
 ,3, The woiKhtoil nirati velocitv of all tho .in 
 
 ^asnros is for tho hydrogen 
 
 an( 
 
 1 holium linos + h5 
 
 1 f ,. ,i,n K lino - '0 km. por sec 
 2 km. and tor tlio a luu 
 
 Dominion Observatory. 
 
 Ottaw-\. May 1012.