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V Additional comments / Commentaires supplementaires: Pagination is as follows: |'»09]-'»29. Th - item is filmed at the reduction ratio checked below / Ce G, "ijme.it est tilme au taux de reduction indiqud ci-dessous. lOx 14x 18x 22x 26x 30x 12x 16x 20x 24x 28x 32x iixJ The copy filmed hor« has b«an reproduced thanks to the generosity of: Ecolc poly technique, Universjtc de 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 opacifications. L'exemplaire filrn^ fut reproduit grace ^ la g6n6rosit6 de; Ecole polytechnique, Universite de Montreal, Bi bl iotheque Los images suivantes ont 6t6 reproduites avec le plus grand soin. compte tenu de la condition et de la nertet6 de I'exemplaire film6, et en conformity avec las conditions du contrat de filmaga. 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Un des symboles suivants apparaitra sur la darniira image de chaque microfiche, selon I cas; le symbole — ^ signifie "A SUIVRE", le symbole V signifie "FIN". Maps, plates, chans, etc., may be filmed at different reduction ratios. Those too large to be 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 filmis ^ des taux de reduction diff6rents. Lorsque la document est trop grand pour etre reproduit en un seul cliche, ii est film§ A part'r de Tangle sup^rieur gauche, de gauche A droite, et de haut en bas, en pronant le nombre d'images n^cessaire. Les diagrammes suivants illustrent la mdthode. 1 2 3 1 2 3 4 5 6 DEPARTMENT OF THE INTERIOR CANADA Uoa. VI. J. tiucut., MiMtltT. >V. n. CuhT, C.M.U., Lmi>ut$ iimuDr. PUBLICATIONS Dominion Observatory OTTAWA .x"* x-:^. ,«,r\0^ .^ W. F. KiNQ. C.M.G., LL.D., Vol. I, No. 15 Director. Measures of y Aquarii BY J. B. CANNON, M.A. JO CAl MT ^03 POl-15 OTTAWA GOVBBNMENT PRINTING BuBBAU 1914 ECULt POL.fECHNiUUh BiBLiUIHtUUE I DEPARTMFAT OF THE INTERIOR CANADA Hun \V, I. '.U.ch;:, .MiHialtr. W. W. CoR-v, I' M (1 , /;r/.o,;„ Minuier. '. :ji :iLVuL I PUBLICATIONS v"* - / Dominion Observatory OTTAWA W. F. Kl.v.i. C'.M.Ci.. I.L.n., Director Vol. T, No. 15 Measures of y Aquarii BY J. B. CAMNON, M.A. OTTA \VA Gl.VBBNMF.NT PRINTING BuREAB 1914 HSIJoH- 1 1 f J MKASrUKS ol 7 AljlAllII. HV J. U. ( ANNON. .l.A. Tlic iiica-mc-- nf Kl'.i plates <>\ wore taken ainl iiica-urtd, liiii aii of I lie lines in each \wi'( iliis star t'ci'liiw. Maiix' nmrc plale.H not ini'lililed here as the incusufos I) (li-e(»ry ti\e two that lioth were diseardeil. What, the reason of this may lie it is hard to >ay. In many >tar spectrograms, certain lines will give velocities quite dilTerent from others but unless some evidence is jiiven some tinie in the cycle of a second si)ectniin beinj; jjiesent. the cause of the divergence in the measures can usually be laid at the door of broad uncertain lines. In this case, liowever, often the lines are very fair, and yet very poor aj;reement is found. It is possible that the cause of such disagreement may be due to the presence of a secondary spectrum wliich our apparatus fails to separate from the i)rimary. yet the effect is such as to form a blend in certain lines which makes the estimation of the velocity indicated very difTicult. If this be the ease, then we must conclude that the lines present in the secondary are in some instances strong and in t>tliers weak, perhaps stronger in sonic ca.?es and weaker in others than the corrcspondinj:; lines of the primary. The star is of A'2 type. As will be seen from the measures, the lines of chief imi)ortance are Hg. X44S1. H-,, H^ and K. Others appearing are ,\ 4549. mo.st frequently, and X ,\ 4.'?52. 4300, 4233, 4128, 4045, 402t) very faintly on a few plates. The lines of highest weight are X4481, Hy and A'. I'l Hl,l. AII..N.S nt IHK DOMINION OBSKRVATOMY. A nihu.. .,f 42 km. was ..l.taincd .,.iito ..arl.v in ti.c work ou tl.c MiiT an.l •.miMMU'.l (.l.s.Tvntions .,., it .•onfirin.-.l tl„. fa.i „f im l.oi,,.. „ I.M.ary. Many att-nipt.^ at varum, ti-n-.s won- n.aid..n.d laul.s ..nd -hon. was no ..x.-us.. for disoanlinK thnn. so tho otluT alt-rnativ.. was^ to .li.s..ar.l.-,,S.l days as ,!„• period. OtluT ,.,Tio,|s of .-,9, til 25 2!)-T •.'!)■(),':, days an.l many oiIkts won- iriod. h.u. as in the ciwo uf oS 1. uuil,. ,!„. majority of ,h,. plat,.s won- satisfLnl. alwavs a .t.ffiHn.t -"m,l,..r I..11 ... far fron, ,1„. p.noral ontlin,. of ,1,,. cMirxv :. „. „,,k.. tl... pmod iM,possil.l... lor ,1... tin... at k-as, ,1... star has 1...,,. onnn..! from tlH. ohs,.rvin, IIm. X di(T..n.n, a,,p..ratn> n,iuh, n.,.! M„n,.,h,n.' '" "" -'';■'•"■"'" '^'' "" 'I'"'-'"- I'M' with ,h.. pr....m, ti,.. lar,,. """'"■^ "/ '''''•■■^ ■■•'"■^"'^ •'''^'" ""'!'•••'"- 'I.at f-rtlu-r ohsorvations w.m.I.I not hf. (it an\ liclp sat.shuMory p.-r,.,,! „,„ wiM.tand,,,, a ..Tiain ron.id.ral.l,. ran.. ,np^t 1„. ""'.'"■'•"••"■'■ "'■ ''''"'l~ •" ii"- "•"-" '1- ■■ ..,.„.., ul,o.. |i,„., var^ '" "":""'^ 7"' '•''^"■'"■"■'- •" -'■'' -' -"■■'. a. ,o ,„ak,. H irnpossU,!.. '"/■^"'""" "'"■ ""•■ -''-^' '" •!- ^'ar a, ,1... rinu- ,1„. plat., w.-re Mf.AM MK~ ,»K •, \ylAKll. 411 'IMXIAKV UK MKASIKK.-" I>K ■> I'Lii. 174.'i 1770 I77!i I7^'

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Jilt J V,l \\i .-,.( tl!i r)7 -Jj :;^ l-J Kudial Vi'loiity ji;."i.i \V1 \\l \ .")i '•> ;. U> .".s 1 ) ii'i'ioi 1 - iiii-oi ;. ~ .' :ni 40 i ."7 J 1 1 14 IJ r.i'i jv I :t2 i;. Is -'II 1 1 .'illHi Ji.M W ' \.l \\l ti (»'l ', 1.-, •-■:! ; II ::s 1 IJ s| 1 .1 7i. 1171 1 " , (' 1^ 71 ;. l,i -^; 17 .', s ^ 1 1 711 |i. ly.i _N ■js ■J'.l J (1 .'. .■I.'ll _'7i II ' \ . 1 W I \ .1 W 1 :;.",'.'ii II :!.s J .'1 1.; Jl OS 1 ;_' ■■.' 1 :m-82 U 1 J., .ij ; L'l In ; 117 1 , - -'II Ooi } 1 J sJ ; II -7- 22 t 12 .JJ IL' T 02 ■Jn 2H 1 ., 7 l.-| () MKAsriiKS OK -> Atjl AHII. 417 \li;\sri!I.S 111 -J Ai^IAlill Cuiilinued. 271.' 272'i 272tt' 27i:i 2772 2 7..^ 27.1s' \V1 \.! W: ■;. 1 w I \.l Ui \ , 1 U : \ . i w . \rl \\l IMil .'.'.'7 - 11 7(1 '. - 7,1 i-> : ! 1 1 77 .' i:,i:i 7i;i; - :i7, 40 ; - 2t» 22 ] ll^l KX) - 12 nil '. 27. 11 1 27, li'.l 1 - 2ti 0^ 1 - 11 07 : - '.1 O, 1 - V 11 1 4:)'.»j 4:iti) - 17 till ; 2i. 7- 1 - 7,1 72 i -- 2N :i!l 1 - 211 :il 1 17, 12 I - 2ii 01 ; ^ 21 111 1 - 2,V77 1^ t:(iK) AZi.i 1101 Jll s'.io - 2;i Is ; - 2.1 .12 I - 2.j():i i - o-ttU J - 17-47| : - 20 7fi ; - 1 41 ; - 17 07 J ■i'MO 1 ~"^ 1 ^j't - 27. 2.- 1 Wcicllt.il liitali — I'.i lis • IJ 21 - 2i; 11 - 11 :;7 - .11 w - 11 :;7 - s 11 - Is 1,S , 1 1.1 - Is 111 ■ 7.1 - is 111 - II 7.i \. + IM 111 (It 21 ■dtl 11.1 -,- i)<; Ciirv. — ■ '_'■*^ — ■ 2s — -2.^ -- ■ 2> — ■ 2s ■2s — ^S Ka.liui Velocity - 7-7 - 15 1 - 20 9 - IS-fi - 14-2 - 17-6 - 17-7 *(.'li^rk inf aj^urrs lis ITHI.lrx 1 I(l\> 111 illl IxiMIMnS i (| , MKASCIJKS OK 1 \^i\ Mill -<:>nlinw>l. 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J ^ iu-o<> - 27 .iit ■J'l - 211- 2(1 1 - 30 7i i - 40 4o • - 23 05 i \\ ligl ti> 20 - Is-'i7 III - l-37 + ir, sr, (II - 24-73 ^ 13 74 r -mi Curv 2n -j>\ _'s 2 s 2n 2s 2 s Radial Vclority - S-U - 'JO - 7 .-. *- ■> . ;; - 12 2 - 20-b - 11-3 MlCASfRKS OK ■> \lir\HII. 42!) MrA-;i"UEs or 7 AOfAriii— r,)r../u,w \ . 1 W 1 riirrili \ . 4ir.i :m U.H! 400 - .■) ■ 7-' i:M0().'i4 -i 10 0( tlOl sflO - 7-S7 :tn:!:t mlT) - •■"•^ .ii; 1 1 •:<'.! i i.i ;iO i H- oil.'! n-7.'> in 11 7J Hadinl Velocity - in.' - i:. Dominion Ob.son-aiory. Ottawa, March loi;-; 'I IK) 4 !•, It 1- jj 'ii; v.',,.' \.l U t \.'l Ui 10 is I, I 1 7 r.r. ' 'I ,"7 I 01 2S 12 s