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 1 2 3 
 
MICROCOPY RESOLUTION TEST CHART 
 
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 1.0 
 
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 DOMINION OBSERVATORY 
 
 OTIAWA, (AN ADA 
 
 Vol. I\', NO. 8 
 
 OHMIT OF THK .<I'K( TR()S(()I'IC I^INAF^V BOSS '.ur^S 
 
 HV .1. H. CANNMN, M.A. 
 
 Hn>. :!i;{S .',>--ir .VV'S, 6--I(r ti'. „iMfi, :> JS. type Bai wa> aniuMiiicrd 
 a >p('clrM-co])ic l)iii;nv l)y Adams fidiii luur |>lat<< giviiiR a raiicc >)f 'JOl km. 
 iAstroiihii^iail .loiiriiiil. \'(,1. XXW. p. ITiii. Tlic linos of the spectrum arc \Try 
 poor, and it- declination hcinn far Miutli, it wa- dulicult to secure pood [)latcs, and 
 more difiiciiit to M'cure plate- when \\anl..l. 'l"hc determinal ion of the orint was 
 '•''"*■'' ''" ■'! plate- taken in the laM two -ea<on-. 'i'he |ieri(id licinu almo-t 
 exactlx- a day and a half had a lendeiiiy to l.iiiich the oli-er\ alions at ceriain 
 ))oint- in the orKil. It will he >een li\ the \clocity cnr\-e. that the rc.-iduals of 
 the normal place- aiv hijili at jioinls near the zero \clocity line. 'I'liis is dui- no 
 ''""''' '" '!'<' other comiionenl. as on -e\-eial of the plates there was a sujr^cstion 
 of douMinii in ><ime of the line- although never distinctly enoufih seen to maki> tlie 
 weaker <'oiii|)oneni measurable. I'late re>iduals are IukIi. hut. considering tliat on 
 st>me plates the \-e|oeiti,.s jriven hy the ditVer ' lines \ary to the .>xtent of as 
 nmch a< 70 km., hitih residuals are to he expected. 
 
 The ohservations follow: Table 1 fjives Adams' oh-ervatioiis. Table 11. the 
 Ottawa observations. The lesiduals are from the Imal curve. 
 
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 I'l.a- 
 
 Vc'lnnt\ 
 
 Uritlil li.'si.in:.! 
 
 J.tL'l.Hll :!71 
 J17 :;()4 
 (I7> llt.J 
 
 .'. ijo '.p.'is 7i;n 
 
 ■J,t.'l.-".tl :i4N 
 
 imi ii7(i 
 
 1(K) 7.''l 
 lljli 7.'i(l 
 Js7 .VI'J 
 
 I i)7:i 
 
 I -.'I ill 
 i:i7:i 
 
 {) (HI7 
 
 II i:.o 
 
 II JU 
 
 II 4_''.l 
 
 II .'iM 
 
 II ^.'li 
 
 f :is.:i 
 
 IIMi ."i 
 117 I 
 MO 
 - .Vi S 
 • .">7 
 r M.")0 
 t- 1114 II 
 
 1 II 
 •J II 
 
 - 1-' 4 
 
 - SJ 
 + ■2 1 
 
 t- 7-7 
 
 • 4 .■! 
 
 IIS 
 
 -t IJ 7 
 
 - (I ■-• 
 
 - li-2 
 
 B>' wsitiK tlif Miiunt Wilsdii iil)s(M-\:iti<iiis in (•oiijiiiictiiiii with our ovvii, tlic prriml 
 \\a-^ ili'tcniiiiifd with coiisidiTahlc aii'urai'V. viz., l.VlliOT ila\s. 'I'hc iithcr I'li'ineiits 
 ul' the iiiliit well' olitaiiicil by Dr. KiiiK'> iiiftlind. They wcri': 
 
 K = 11.') km. 
 
 . = •().■) 
 
 a> = 1 !».")- 
 
 7'J= .1. I). l.'.42(l.',ll7lKil 
 
 7 = — 1 4.") km. 
 
 Okc h'ast-siiiiarcs snkition wii.-< carried thrminh. the vahic of the iicriod being 
 taken as fixed and omitted from the sohition. The lesuhinn eorreetions are 
 smalh hut the vahie of L'/icr wa.< reihiced about 'M\ per cent. The correeted 
 \alue> of the elements are ni\en tielow with the jirobable errors a|)])endeil. 
 
 a: = lis- 111 km. + SO km. 
 
 r = OTS ± OOS-J 
 
 w = IS.j'-OS i (I ■.■)4 
 
 7' = .1. 1). •_',4_'O.U17:.7;i t (i;}^ day 
 
 7 - + 1 Tit km. ± -T'J km. 
 
 /' - i:)();<()7 days 
 
 (I sli, I = •J,4:{:),0(H» km. 
 
 t)i, siir / 
 
 (I ••_>.-) O 
 
 I'lolialih' I'lror of ^innie piati 
 
 i:'« km. 
 
 Dominion ()b>er\ator\' 
 Otlaua 
 
 June. i'.ilT. 
 
iHnri (IF I'lii. si'i.crnoscoi'ic niwRV noss iii.is 
 
 133 
 
3 TaSM OODblSll 
 
>fr 403 
 P04-03 
 
 1 5 Mh ;399A#>