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 1 
 
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 12x 
 
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 28x 
 
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 1 
 
 2 
 
 3 
 
 1 
 
 2 
 
 3 
 
 4 
 
 5 
 
 6 
 
MICROCOPY RESOLUTION TEST CHART 
 
 ANSI .mo ISO 'EST ^hi«: No i 
 
 1.0 
 
 I.I 
 
 ilM 
 
 [1 2.2 
 [ 2.0 
 
 1.8 
 
 1.25 
 
 1-4 i 1.6 
 
 ^ APPLIED IKA/1DE he 
 
r.\*>' 
 
 -•<'^ 
 
 ITIiLICATIONS 
 
 Hi lili: 
 
 DOMINlOiN OBSERX'ATORY 
 
 Ol r.WVA, CANADA 
 
 OHIUT OK '1-iij'; si'i;cri{()S((»iM(' hixaijv a dkacoxis 
 
 I!i W. i:. II.Mil'Kli, .M A. 
 
 r ^^ 
 
 'Ihis star (rt !(■>'' .')(>'", 5= +(;,". h/, plKitoKiapliic iiiiii;iiitii(lc ,")•.'{, tyi)0 Vr>} was 
 aiiiHiuiiccd as a spcctniM'opic liinaiy l)y Caiiiphcll in A.slnij,hi/.'<;ral .hmninl. \. jjagc 17S. 
 His fuiir (ihscrvations, ^wm in the talilc of incasuros, slum a range of lid km. The star 
 was pla(T(i (,n our (.hscrvinM; iiroKranmic eleven years ap), hut it was not followed up 
 until tills year wh(-n 2,") s])eetroKraiiis were ohtainod with the single-jirisni spcetrofiraph. 
 This is somewhat fewer than the iiuiiiher of observations generally used in determining 
 an orbit, hut the lines are very good for measurement and none of the plates show large 
 residuals from the final eiirvo, the prohahh' error of a plate heing +l-,3 km. i>er .serond. 
 
 Ahout 1.") or 20 lines were measured on the i)lates. Their wave-lengths are given 
 in the following table, whieh shows also how many times they were measured and their 
 residuals, taken in the sense, mean velocity of jjlati minus line-velocity. 
 
 I.INi;s 1\ /( DltACOXlS 
 
 
 
 Times 
 
 1{,-S 
 
 diial 
 
 
 
 Tirnps 
 
 H.-.- 
 
 dual 
 
 X 
 
 I.lrlMi-;il 
 
 Ml-!1S- 
 
 
 
 X 
 
 KIcMlL-Ilt 
 
 , 
 
 
 
 
 
 urcil 
 
 Xuiuciii-al 
 7-0 
 
 AlKchmic 
 -1-,H 
 
 urcil 
 
 Xuincriral 
 
 AlRcbraic 
 
 4572- 10(i 
 
 Ti 
 
 (i 
 
 4271 7.55 
 
 Fe 
 
 24 
 
 5-0 
 
 + 0-t 
 
 4.">4'.)sn<,l 
 
 Fi-Ti 
 
 •>') 
 
 7-3 
 
 + 0-.-, 
 
 4260-601 
 
 Fr 
 
 16 
 
 4-9 
 
 + 0-4 
 
 4.531-410 
 
 Cr-Fr 
 
 -i 
 
 (1 
 
 -0-4 
 
 42.50 ■ 593 
 
 Fe 
 
 9 
 
 5-0 
 
 -0-4 
 
 4.-)01-.-.l7 
 
 Ti 
 
 3 
 
 3 3 
 
 -0 2 
 
 4236-121 
 
 Fr 
 
 12 
 
 li-6 
 
 + 4-1 
 (1 
 
 44S1 S4,S 
 
 M'J 
 
 4 
 
 11 (i 
 
 -2-3 
 
 4233-475 
 
 Mn-Fe 
 
 15 
 
 6S 
 
 44,TO 072 
 
 (•<i-Zr-M„ 
 
 <.l 
 
 .') () 
 
 -1-0 
 
 4227-0.55 
 
 Cil 
 
 14 
 
 4 ■ 5 
 
 -1-3 
 
 4415-3WI 
 
 Fi- 
 
 21 
 
 .5-1 
 
 -0 2 
 
 4215-727 
 
 Fe-Sr 
 
 
 
 3-S 
 
 -0 
 
 4404 ■897 
 
 fe 
 
 24 
 
 0-4 
 
 +0-2 
 
 4202-308 
 
 Fe 
 
 
 3-7 
 
 +0 3 
 
 4395-446 
 
 Ti-V 
 
 6 
 
 3-5 
 
 -0-9 
 
 4198-702 
 
 Fe 
 
 10 
 
 6 2 
 
 -2-8 
 
 4383-690 
 
 Fe 
 
 5 
 
 3-6 
 
 + 1-2 
 
 4143-897 
 
 Fe 
 
 19 
 
 6-3 
 
 -0-8 
 
 4352-048 
 
 Cr-Mg 
 
 12 
 
 8-9 
 
 +0-2 
 
 4101-890 
 
 H 
 
 5 
 
 13-0 
 
 -3-6 
 
 4340 634 
 
 H 
 
 19 
 
 7-2 
 
 •fO-o 
 
 4071-929 
 
 Fe 
 
 15 
 
 2 7 
 
 -0-5 
 +0-9 
 
 4325 799 
 
 Fe 
 
 20 
 
 6-2 
 
 -0-5 
 
 4063-770 
 
 Fe 
 
 17 
 
 5 6 
 
 4308 044 
 
 Fe 
 
 21 
 
 6-7 
 
 -1-2 
 
 4045-966 
 
 Fe 
 
 17 
 
 7-1 
 
 +0-3 
 
 !89-904 
 
 Cr-Ti 
 
 3 
 
 1-8 
 
 + 1-S 
 
 4005-3.56 
 
 Fe 
 
 3 
 
 3-1 
 
 +0-8 
 
 !82-793 
 
 Fe 
 
 2 
 
 3-6 
 
 + 0-S 
 
 
 
 
 
 
 t)«<>W— 1 
 
 
 
 
 
 
 
 
 
 
 MT 403 
 P04-16 
 
/yi 7 '/c 
 
 ;CUIf POIYrFCHNiU'JE BIBIIOTHFOUE 
 
 244 
 
 iMHi.nviiuNs or iiii: dominiun ihs-i i\ \|(irv 
 
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 l.lrk 
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 - 4-2 
 
 -13 1) 
 
 -20 7 
 
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240 
 
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 Our own ohscrviiti.pii- wlini |i|.iiir<l khv.- ,i |..ti>>«1 arnuiirl .Vi.lav^ ii tl,.. c, 
 iiiiiiiImt of cyrlo liii-* l)c<'ii liikcn to rnmiccl up Ih,- l.ick nli-. r \ if kuw with nur .iwn. rli. 
 pcrifxl ilclcriJiiniMl, ,-)! 710 ilav-, -liquid \,i> ruint I at Ifii.-I to tin- sccon.i Jfciinai |.lnc.' 
 With this pcrHxl, the Ottawii uIimtv atious were uinupod nrrordiiit? l.i pliii>r jntu II 
 normal placo and i{ra(thical clcnicnl- (Iflcriniiicil a- follows: 
 
 / > -.1 - I < 1 . 1 . . . 
 
 A 
 
 .'.I 710 .lays 
 
 IS j:, km. 
 
 ■-'■_' (ij km. 
 .1. 1). J.ni.si;! <i:{ 
 
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 up connecting the residuals with the elements whose values were to ho imiiroved upon, 
 munely, 7, A.', r, w and T. In the e(|uations, wei(?hte(i as al.ove, suhstitutions were miide 
 as follows: 
 
 X = 67 
 
 .'/ - «A' 
 
 2 = K &e 
 
 II = K Su) 
 
 r --■- |0;{ti()t)<»| 67' 
 
 onSKUVATION IXilATIONS KOK A DRACOMH 
 
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150 
 
 PUBUCATIOXS OF THE DOMINION OHSKKVATORV 
 
 NDKMAI. eWiaTIONS 
 
 :{()r)(t.r + isL>v - ■:,-,- z + m\)h - ■•>mv - 304 = 
 
 \-M\Xii + •l.-)5^ - ■;«2« + •a.'iLV +o31 = 
 
 ItJoSz - ■;«()(/ + ^Tli' +-7<.>5 = 
 
 \(\.V.\it -l-)87r --.ItW = 
 
 1 • .")()<•/■ + ofW = 
 
 iniiii tlicsc ilicrc resulted small eorrections td the elements with a eorrespondinj; 
 icduction of "^prv f(i- the normal places from 2()() to 'll 1. Th<- final elements are: 
 
 I )ominion Observatory 
 Ottawa 
 
 Oetober, litis. 
 
 I' = ol- 710 days 
 
 r = 128 ± 03,-) 
 
 w = 32!)' -32 ± 14° (lit 
 
 A' = 17!H) km. ± 70 km. 
 
 7 = -22r)<,)km. ± •47 km. 
 
 T = J. I). 2,414,813 7.-> ±immda.vs 
 
 n sin / = 12,()2,-),0()0 km. 
 
 {HI + Wi)'-' 
 
 ■03 O 
 
OUIUT or Tin; SI'KCTKOSCOIMC hlNAllV A DKACOMS 
 
 251 
 
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 / 
 
 
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 L . 1 
 
 
 
 
 
 
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 1 
 
 Days 
 
 20 30 40 
 
 K;i4|i:il Vi'lopily Ciitvi' of h Dnimnis