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', - I'l-:; ; . 1.7 II •711 ■ 71 ^ -■2:i0, ■J',i-ii I Ml :;i)-6 -25 -4 <.)-5 ■jr. -8 J^ ■ 7 1 I J 7 II IIS OJs 7.-) ..II I J7 II PS (I Js +1)7 ■ < ; *7J II .;i 1 U 1 ■:i.". II 1 ■". 'I J I ;; :;o(i ij'.i I + 105-.51 + '.n)'.t\ rlJl I fi'j;i>. -JO-T +91 -Hj +79-7i +Si-7 I :,ii III I J II Js 77 !0 ■l.:;ii II iij II Js - ;i;3- + 711 -35 a :;j' 1 :ill + 108-8 -rl-'«-S + iii-:i -.-Kid -") + '.17 1 -|-ll'.l-7 :illl 1 7 7 J II is (I J.s + '.111 s ;. -^ i:i5 •1 . i i:,s :i ', -^ IHi s 1 f 11 ill - 1 7 "■' — II is Vrl. \Vl. - -w-;) + '.)".! J OHIHT (IK IIIK SI'KCIKliSCdl'IC hlNAlO H) AIKIC K 105 400:. tlliiO •to:!:: ■l(ii.'> 4(h;:! 1071 11)77 411:! 41',tl 4J1.') 42r,() 4271 VJ'IO 4:1(17 4:i4() 4;i.")i Weight c. I iin:in V, ( urv Vrlncity MiiAsrm.s OF i(» \['HU;.'E-coiiiin>trti 7498 I'niiiMrv Si'ciiriiUiry V.l. \\l. Vd. U^ -:j2<» 1:5 il ■;iy-7 7321 Primary ' Sccoudiiry \,1 \\t V.l. \\i I -Jl:i :;:io: '■M \ ':!7 -J -4;! s -:!(i">! -:m-2 -:i0 1 + li:v(i f VJds i-ii:!i>; rllNd -.-iii:.-.' + i(i:i'.t + i(ij-.', fi:iii - 4 a 4-1")-^ - (il + 108 (ii 5 i- ,s.")-,s! 1 "52r> I'riiiiarv Sicdiulary Vrl, \\l Vil. \\1 + 0-4 + G-8 + fl-O + 1:M1 + ■i' + 95' + til + 140 nr)<.i7 17 71 L'l ■ -js i ii:m«i - 17-74 - (I Jl - (t-J.s ti 47 117 (I 'JS 20 H + 120-9 + 9-:i 0-0; + S--J +91 -;i f'.M)-7 +93-1 + fi-Sl 5 + 11-:;' 1. -t- 7 1 \ + 104-2:1 - 2ii-!i:i - II 117 - II 2s + 77-0 - o-c: - (is 4 15 ..i !ll 0-1; II-2S 2:i-2 + 92-00 - 2(i-91 - II - II 2S (i4 4 Vil. \\i. lOti I'l lilUAI'KiNS el llli; l)(iMl\lHN iMi-l.H\ ATuKV Mi.\>i IMS III 10 u i!ii;.i: C',,,!,!,',,.! Illll.'l lll.lll hi:;.; ini:, iiiii.: III77 II 1.; 11 'I I lJn_' IJ.Ml U'r-I l-'Tl I.'--',' i;;ns t:ili) ::i.'vJ .'i.'i ■IIM i:.oi I'll' \Vi i^'l.t.'l V, V, ( 'iirv I!:ull:.l Vil.M'ltV 7 ■'»_'•• I'liinary I Swmi'lary \.l. , \\l, \\l Wl •576 ■ .", 1 11. i III) rl'.is 111 'j:i ■ ;i - s.'i o -Kl'.l - !I.')S Primary ' Scfomlary \,l, \\1 V,-l \\i -^M:Mi 10 I', Js ■ ^ . n.ii 1 ll'T ', -+-HI.S J !•_• 11 ', -IJl I 111 ;i -11'' 1 J 1 5 ■Jlis ■17 .: -■2:\-: -:« 7 ! -1S.2 i -'Ji II 1 -h (11 u ~ -JiMIl _ ')(', .1,1 - L'N 7^1 ^ 11 Jll 10 ll-J^ (1 Js + 63 7 - ji) -l.V.i 7 -M.i;i -l."ill!l 7787 I'niiKiry | Secondary \,1 \Vi V.l \Vt -li:! ',1 '. -71 11 ] +-l7-:2 1)7 1 i -nil' i i, . . ■IS- ■;>:i! ] -uMi; -7(i:i -:mi -llli- 1 --11-4 -nil ;i +5;i-«: ; -|-3-)-.s i-ii')-^ .-,7 :iii i 17 ."HI ■J-.'-sr, r •^2 St) 'ji • n 21 - :i4:) 7U :i \.i \Vt. iHUlIT 111' Till; SI'lXTKOSrol'lC lUNAUV 10 Al UKi.K MKASUUES OF 40 XVlilGj£— Continued 4U1.". 4iHi:i 1071 11 i:; 11 'IN 12 1.'. ij:i:i 4-.':i(i r_'."iO •IJtiO 1_'71 4 '2 VI 4:!'J.'i i:Uo 4:;.-.l 4:i'.i.'i 44S1 4.'>(H 4.'>4il i:.72 ■810 Primary ; Scciiiulury V,l \Vl - s'.) • ti -S'iO -Ml -4 -SS-f. Vfl. \\ t -7S-:5 -SOT) -'.IS '7 + r,'.i 2 i + s:i c, i + SI (I ; -t ssr, ; + 90-2; i 7S11 I'riiiiiirv ■ .Si-iunchiry V.4. I \Vl. V, i, W t S2 1 + 92 •51 J - 71-8 - 7S-7 + li:i-li i 7s7:i I'niiiury Srromlary V<1 \Vl Vi! Wt -5S.3 1 -5t ; + «l-3 i + 70-3! 1 70-3 5 +103 71 i -SI -41 1 + 7ti-7; -St;-:!! ; i -i- s'-'y \ -77()! ! Wi'iRhtcd iiu-an - s:! I'.l \ , -t- 2H i:i \i + 1) 20 Ciirv ' 2S Iladial Velocity — ;i.) <> 4- s7 :;o 1- 2s i:i + 20 - 2S + iir, 4 - 1110 N \ - s:', (\ ', - '.Ml 2 i - 1.12 H ;. -fS7 N 1 - .SS-O, i - SSDJ J [ -r 7:M ; - 7ti-() ; i + lio-iii 1 , ' + ""■•■' - 97-4i J 75-8 5 + 104-3 + 96-8 +2S-3 1 -t2><\ 1 -54-,; ; ' +40 -3()N 5 -.M.:i ; 4,-, ■ 4 1 - S.'i (>1 f 2S-20 f- oi:! - 2S ^ .SS'.IH 4- 2S 20 -t- (IKi - (I 2S + 117-0 -.V.I 1 i 1.'>-1 ,72-4.S -r ;il .-,2 27 IS 4- 27- IS 0-21 -I- 21 2S - 2S 107 - 2.^1-4 + .-jS V, 1 ' Wt. Ids IM llMi MIiiNS nr Tin; l)()MI\|i>\ ollSl'KV AH Hi V mi:a>i i.'i > tn- wi \i i;i(. i: - Cnf,iiniir,i II HI. I -i(i,;o ln:i:i mi:. 1(11..; 1II7I 11177 11 li 11!ts IJl.". 4.'.!:! r.':;i'i i.'."«ii r.'i'.n rj7i 4Js'l l:iiis |:;j." i:;.",i IIM l."l'.l V .is;l,l,..l Illr:in V. \, Ciirv. Vi'locitv 7 - .s'.l . .' -li.") '.I 71 ■>» 7r, 1 711 '.I -IJli. -l.'il .^ 111.-, rllt 7 + 9tO + HI1-.V f-iir, :i + 1J1(| + r.':i 1 8074 _ 71 71 ^ii:i :i."> ^ s III r Xlll -, 111.' -T I* 1-' - I) Js - II -Js - ti:j.,s +121:; rniimrj' I Secondary \<1 \\i Vfl. . Wt - Jil ■ .' - i:l-;). li! ; +119 (I ■j7.!i ; ' +iir, I) :ii li ■.i2H J + i:iO..' .':i-7J ■jr, ss II iir, II 'i^ - oU-'J -li> ■■-'.-, - Jil.ss - II or, - (I -j.s Ul(l 8()S1 I'riin^irv ' Si'i'imilMry V(l. \\i \, 1. Wi 111 ir,-8 8-6 1-6 -lS-0 + ll,i + 1'.'.^> + i2'.i :, + 112 2 \,1 Wt +115:. 5 ~'JII (. + ',12 I 1 - -J.-, .-. + '.Hi-N ', - 22 .- - 10.-, 1. t -I'.l + 10S1 ; - •2-S' + l(Mi r, t - ill + 121M 1 * - i:i .s . ~l.-,.7 i 11 70 II lit l|.2s - 42 -112 - (Mil - 0.2S + S4 b iHlUldl llll. SlTCTliHSCdl'Ic IIIN.\1{\ 111 AlHlCi: 109 MKAsriilS or III AfUIC..!'. C.itrlH.l.d \mn ■ioi:> iiHi:i ■1077 tli:! ■11 '.IS IJ I ."> 4-271 ■»2Wt 4:ii)s 4.V.'.-) 4:mo 41M 4.-I I'.l 4-j:iii Wriclitnl mi'uii \', Ciirv. Hailiiil Vcloi-ity S0S3 I'riiiiiiry i Si'i'ipthI-i,' Vrl. \Vi \.l. \Vt 8084 14^1 -14 -2! - irol :!14 ■ji) (1 -\\'^ 113 -I'J- + II)17 + Ill4':i -rll:i u + 111',! + 117 .-. ■f l:!:; II + 111 -d + 11-.' .-. 1(1 (M) ■J7'-':i 1,") js 43 ■ 7 + 111 M - i:, - 'JS + S7.J I'riiiiiiry ' Sccoii(!;iry V.l, \\i V!• -3 ."» '1' '. -IJ ', -:!ii '.1 ' - '.'1 1 ■ ; - ( - ; - ."> 2 ' - s 3j \ \ + !I2'S' J j +110 II 1 I +117-HJ + 12S 3 + 1 1 1 ."i -1-110 + 11:', .-. + !is- I - lii'.i .". 1 1 ."> 1 ■J7 -J I 2-.' 02S 39 . 3 ► lio.:;i) - 27 ■-'! - O 22 - ()2s + .V2li V.I \\l. \,l \\t. \V1 \Vl. Ill) I'l iu.i'\ri(i\s di Tin; i)(iMiMi)\ ciusi,H\ Mill;"! Ill llir im:i iiiiil V (if llir i;ill\ plate- tin' lilic- ai'c -ilit:i<'. fm' lln' -hapc of the \f!(icity (•ur\i' i- -null iliat platt- lakrii at laiiilniii -laii'l aliiuit ow rliaiicc in -i'\cii nf -Imwijif; ilic two ('(inipiiiii'iii- lac ciKiiiiili ajiai'l In lie rc^nivcd mi oiic-pri^iii >pc<-trf tlic \clii(it>' cuiM' ua- -u-pcctrd tViini the \\t>\ few platc~ and a> --iiiiii a- llir pcridd wa- appr(i\iii:ati'iy di'tniniiicd, a lew rxpn-mc- were made willi llir -lit roiild lie ri'-(il\cd ill llir in!. al. plia-t' . lurKc ti) lliirt\' da>s id'. iiii\c). Tlii- attempt ua- uii-uecc--l'iil and n the (ili-er\ alimi- tliereatier were ciiiilined in lieiieral to the naiTdw limit-, piia-e- iVmii two tn e!e\eii dav-. 'i'lii- pi'iilileMi 111' deleneiliiiiL; -atl-l'ailiirN elenieiit.- pre-ellt- some dillicultics. ( )nlinaiil>- when iwn -ei- nf line- are \i-iMe ,iii the -pectr(ii;rani-. it i- possihle tu make ll-e 111' l!iM plate- takill Hear the ei'.'--inir pninl- dl' the two (ailAe-. Plates were taken at the-e point- ami weri' ii-c fill in lindiiiiT I he pieliiiiinar>' clenienls, liul they were not ineliiili'd ill tile hiial -oliiiion l;eeai;-e the -ha]ie of the railial \('lo(it\ (•ur\es liet'ore and after i'ro--ine are \ery di--iiiiilar. The re-iili i- that the fiiia' elenieiil- re-t upon niea-ures of ])!ate~ where only the two -peeira are \i-ili|e. There can he no doiilit that niucli more dl teriiiinate eleiiienl- would le-iilt with higher di-per-ion. lint the final elements ^ivcii are lielievcd to lie fairly aeeiuate. Tin- lielief i- I'liiinded not only on the small proliahic error-, wiiieh the lea-t— i|Uaie -ohllioii a-siy:ns to the result>. hut al-o on the di-positiiin of the M'loeitie- where the -peel roi;|-ains -how ?ingle lines. The oh-ervatioiis where lioth cuinixdients were visible were liist grouped into normal plaees. ciiiiuin! iiii: si'i'critdscunc iu\ \u m \iitii;i: 111 II) 11 I'.V NdliM \1, ri \<'|.>4 I'riiiirirv Jilliiiii D.ii.' fn.111,1, I) ■J.t.'II.HVJ Velocity W.iiilit i> Ci, : in (• .1- •-MJii.mr, -.'(.'i •1-jir, - Hi 1,0 H |i;n I'lihi 1 i\<.»\ -■_"• in 10 H.T Jl 1 " J 1 1 1". {,11 ■s |ii7 101 :. I'll "j'J .III 1-J li.7 i.-'J .'. !._'_' "il .'II 12 It.S 111 1 li 111! 11.", ■Jii ■ti ins I 111, 1. hill - 11,', ■_'ii •S 11. s Us nils .','1 nil 12 n.'i ji:; 7 Jl:; 12 III! 1-2 ti.!l ISl 7 IM - 1-' Ill Mi ti.'i ;ij 7 7I-' :!ii in .s 171) (HI 1 s IKU -j:i 1,(1 10 +2 + 1 - 1 + 2 -H -2 + •-' .V2 ' 111 Sli •>:! : 12 ■H2 ! U III !H) : ■0.') ' + 1- + !)■ I + 2- -:t _■> . f I- -.{■ + 1- + 0- Sr,'..l|.|,,r\ Vi-looity WiiRht (O-C)i -f liti I + 7.' .■) , ',11 ,", , !ll 1 , + 10.; 1 'till II • 111 II . 117 'I r '.!■-' 1 r si ■! • + 7.'. ■-• !+ i-'i-"' «M-). -i-4 Ih +t)-2(l -:i o:i -1 2H 1 lyj J J '- 1 Ml (1 111 t I i:i -0 IIS -O.lMi -f4 21 f i(;2 -n ;i7 -1 ."ii t 1 no ■ 10 +tl '.12 -0-77 + 1 11 -0-(i,s The ivla.iiiii 7i/,(, + ///j) = niA'i 4 //^i I'j wii.s traiisfi)niiril t).v piittiiiK /,- = ///i iih ami /y = 7(l+/.'i so that it hccoincs ,v=r,+/.-r., Tlio twclvo normal places for I'l ai i V'j flivc twelve ohservatioii equations to (U'lerniinc y ami k. This solution was made and gaxc /,• = () SI'S //=+:^l -.'>() or 7 = + IT- 2 kilometics. The normal i)laees and the indivi hial observations, where the two components were not se{)arated, were now plotted on cross-section paper a-^ in the radial \'elo''ily curve. The value of w was assumed to ho 1S0° for thi' piimaiy curve. !/.(.i the one showing; the smaller anii)litude. The deterniiiuition of c was made l>y trial. It is an easy matter with Kiiifi's graphical method to try any jjiven set of el(>ments and a-^ o) is already assumed known, the only remaininfi elem(>nts that need to he varied are A' and c. The following elements were .selected. /-• = 2S-2,Sdays T = J. D. 2,42(),4tiS-2() e = • .')(i a,, = ISO" 7-4- 17-2 km. Ci = - 11 49 km. C, = + ')2-31 km. K: = ol-41 km A% = 62-70 km. 11; I'l ni.ic \ I i'i\^ ( ,i rill iMi\M\ii i\ ciit>M,'\ \ iiii,"! 'I'Im' fr-i(|ii,il- vliiili ir-iill liiiMi llif-i- rlciiicnl- :iic m\i'ii iiiniri' \\ii- licailirij; O-Di III llic lalilc (.1 iimiii.'il |il:irr-. In maUini; a Ira-I --i|ii:iir -uliillnii, all iIh' cli'iricnl - ~a\{' /' well' incliiilcil ainl llir i-li'iiiciit- . u|;>| |(\ \ I |i i\ 1 iM \ I |(p\.s 10 II 12 13 1 1 l.'l 1 1', 17 IS l!t, 'JO ■21 -M W. it;l,l 1 ] Tils II ' 1 IKf) ■ :a)s + r,m -■-' .".JO .s - ' i: ;u II (II J - 477 + ti!t5 -I l:;ii 1 1 JIi. II I'll, - ASH + ■•.'.•> + • loo s - 1 :;is Ji .1 1 - :',:',t\ f csn i 1 SI ,11 1 ■J ' I IJJ ii::> ■_'i ii 1 r .',7_* - .' r,.;o 1 ■ » 1 :.ii l.",J ii 1 ."ii.a :. 1 -J OH, 010 +2 :i:i(i ! H 1 " ''1 11 i:!l ^ 111.', ■J.'.l -■-' SJII 1 .» 1 ■-'IIH II ."i_"i H- ; 1" 1.", 7J'i ■-' l.'O 1 J 1 U".l| II 7s(i r • 1 IS - 7L'7 1-.", 110 1 r. •Mm 't_'s f ISJ - (is;i f 1 1 ! "Ill 11 .\ ;,;t, 11 ,1 (lll'.l -H ■ r,m - lUI +:{ o.'iO 1 70S -1 ■i:is + ■ r.id - 7**7 -1 ISIl 1 . '.i:!ii 1 IIJ -4- ."iSJ - sis • :; (i.'.o ^} II • 1 Jli; ■ .1 i."i r- 17:; - ss.-, • 1 O.'O 4 (1 r 1 ills .'.17 ■t- ■ 100 - s:iii + .•,■720 Ii -1 l.'J + OKI + ■:)I7 - Ciis -t ■-' ',1110 r> ■ 1 .",11 .")."■_* 111 - ■_'i',s + 1110 :i ■ 1 .".1 ',0 11 ■_'."( 1 i.'i 1 - iilti fO !ISO 1 II - I ."j.!!! .VJ'.i - l.'7 < ;;iin -1 JIO t) (1 . 1 -MIO 1,1.-, - ■isl ■r ss!l tO.:i7() 1 ti ; l-O.'iO ;i.-,i - .■||7 t- .ss7 1 '.1110 N II • 11 (iia -1 i:;.' - ■ ."is7 + SlO -0 OJII t * 7:i>; 1 -Ml — 1117 (- 7111 -1140 5 iiljM 3 133M QOOblSOl 1 uinUiol nil ^I'l 1 I !!">' "I'M IIIN \in IrMIUi.l li:{ \\ )|>T<' .'• = '/> .: -./A'j II - til (l-.-')J rill' iiiir!ii:il «'i|iiMticiii- :irc' 1 s :<( i( h - 1 1 ; -^17 ^7 ■y, ( i( (( 1: - ;rss_',/ -(M)4'.i/ -(I :i(Hw/' -:> Jiu-o -t^ 'X\:\z + 1 Mun -11 li:{(l/ -(I IS'.I*/' )■(•)( 17'/ -\ ()'.»7S/ - 1 \s:tir + ;{ ():n/ - 1 771(r i-J 7!ts = (l + () ,">71 =0 + 0-4(i(l = - 11 '.l.T_> = \\ lunci' .'* ^^ — 11 ■_•"■{ or r/7 - -11 J". t km. 7 = - (M>:{(t '/A'l = -(Mi:i km. ^ = - istl ,/A',.= -0 lit km. (/ = - (1 UNO /. ^ -(I ()():is .'• = - ■_' • S( IN (/o) = - 1 li'l \r = 4- (1 ihi ,/'/' = + ()():{ .l;iv and ilu' liiial cli'infiit- witli iluir pidhalilc iTi liccdmo, P =1>.H-2S (lays 7" =.I.I).2,r-'(i,4(;s 1<,I7 u', -17S 41 u'.. = r-tio A'l =-.")l ;is km. A', =f,2:)l km. 7 = +It)lM km. '/, ^iIl /= l(i,.jr)(l,{)0() km. ,!■: >m /=-J(),14(),()()() km. Wi sin^( = 1 •3r)4 O /'/> Ai\^i= 1 li:i o ()().') (estimated) •OSS day ■(Hl().j :r 1 ;r I l-.")!! km. 1 M km. ISS km. Dominion Ohserxatorv Ottawa Mav, l!tl7. Ill riiii.i< \iiiiN->N i'U>i.u\ \ iiiK\ a \ i-l.H n^ ^ iirM- "t 4ii Viiriu.f