CIHM Microfiche Series (Monographs) ICMH Collection de microfiches (monographies) Canadian Institute for Historical Microreproductions / institut canadien de microreproductions hlstoriques Technical and Bibliographic Notes / Notes techniques et bibliographiques The Institute has attempted to obtain the best original copy available for filminn. Features ot this copy which may be bibliographically unique, which may alter any of the images in the reproduction, or which may significantly change the usual method of filming are checked below. D D D D D Coloured covers / Couverture de couleur Covers damaged / Couverture endommaget Covers restored and/or laminated / Couverture restauree et/ou pelliculee Cover title missing / Le titre de couverture manque Coloured maps / Cartes geographiques en couleur Coloured ink (i.e. other than blue or black) / Encre de couleur (i.e. autre que bleue ou noire) Coloured plates and/or illustrations / Planches et/ou illustrations en couleur Bound With other material / Relie avec d'autres documents □ Only edition available/ Seule edition disponible D D Tight binding may cause shadows ordistortion along interior margin / La reliure serree peut causer de I'ombre ou de la distorsion le long de la marge interieure. Blank leaves added during restorations may appear within the text. Whenever possible, these have been omitted from filming / II se peut que certaines pages blanches ajoutees lors d'une restauration apparaissent dans le texte, mais, lorsque cela etait possible, ces pages n'ont pas ete filmees. L'Institut a microfilme le meilleur exemplaire qu'il lui a ete possible de se procurer. Les details de cet exem- plaire qui sont peut-etre uniques du point de vue bibli- ographique, qui peuvent modifier une image reproduite, ou qui peuvent exiger une modification dans la metho- de normale de filmage sont indiques ci-dessous. Coloured pages / Pages de couleur I Pages damaged / Pages endo~cmagee.s D D n Pages restored and/or laminated / Pages restaurees et/ou pelliculees Pages discoloured, stained or foxed / Pages decolorees, tachetees ou piquees n Q 1 Pages detached / Pages detachees h/ Showthrough / Transparence D Quality of print varies / Qualite inegale de I'impression Includes supplementary material / Comprend du materiel supplementaire Pages wholly or parlially obscured by errata slips, tissues, etc., have been refilmed to ensure the best possible image / Les pages totalement ou partiellement obscurcies par un feuillet d'errata, une pelure, etc., ont ete filmees a nouveau de fagon a obtenir la meilleure image possible. Opposing pages with varying colouration or discolourations are filmed twice to ensure the best possible image / Les pages s'opposant ayant des colorations variables ou des decolorations sont filmees deux fois afin d'obtenir la meilleure image possible. Additional comments / Commentaires supplementaires: Pagination is as follows: p. (l59]-168. This item is filmed at the reduction ratio checked bel'^w / Ce document est (ilme au taux de reduction indiquL dessous. lOx 14x 18x 22x 26x 30x / 12x 16x 20x 24x 28 32x The copy filmed hero has been reproduced thanks to the generosity of; Ecole polyLechniquc, Universite de Hontrcjl , Bi bl iothcque The images appearing here are the best quality possible considering the condition and legibility of the oiiginal copy and in keeping with the filming contract specifications. L'exemplaire filmd fut reproduit grace i la g6n6rosit6 de: tcole polylcrhniqtJC, Univer^ite <)e Hontrcjl , [ii bl iotf.c-quc Les imaojs suivantes ont 6l6 reproduites avec le plus grjrid soin. compte tenu de la condition et de la nortet6 de lexemplaire film6, et en conformity avec les conditions du contrat de filmaga. Original copies in ^> ited paper covers are filmed beginning with the i ".i cover and ending on the last page with a p.'inted or illustrated impres- sion, or the back cover when appropriate. All other original copies are filmed beginning on the first page with a printed or illustrated impres- sion, and ending on the last page with a printed or illustrated impression. Les exemplaires originaux dont la couverture en papier est imprimie sont film6s en commencant par le premier plat et en terminant soit pa' la dernidre page qui comporte una empreinte d'impression ou d'illustration. soit par le second plat, selon le cas. Tous les autres exemplaires originaux sont filmes en commengant par la promidre page qui comporte une empreinte d'impresjion ou d'illustration et en terminant par la dernidre page qui compoae une telle empreinte. The last recorded frame on each microfiche shall contain the symbol — •'(maaning "CON- TINUED"), or the symbol V (meaning "END"), whichever applies. Maps, plates, charts, etc., may be filmed at different reduction ratios. These 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: Un des symbolos suivants apparaitra sur la derniire image de chaquo microfiche, selon le cas: le symbole ■ ^ signifie "A SUIVRE ', le symbole V signifie "FIN". Les cartes, planches, tableaux, etc., peuvent etre filmis cl des taux de reduction diff6rents. Lorsque le document est trop grand pour etre reproduit en un seul cliche, il est film§ ^ partir de Tangle sup^rieur gauche, de gauche d droite. et de haut an bas, en prenant le nombre d'images n6cessaire. Les diagrammes suivants illustrent la mdthode. 1 2 3 1 2 3 4 5 6 Poiip!'.? DEPARTMENT OF THE INTERIOR CANADA Hon W J RocBi, UmhUt. W W. Com, C M.O , Depulji UinuUr. PUBLICATIONS Dominion Observatory ^^^r.V OTTAWA vV-* 14^ W. F. Kino, C.M.G., LL.D., Director. Vol. I, No. 6 The Spectrum of Nova Geminorum BY J. S. PLASKETT, B.A., D.Sc., F.R.S.C. > CAl MT 403 POl-06 OTTAWA CioVl»NMENT PBINTINO BCMIAU 1913 tCOLE POlYTtCHNlUUE BIBMOTH^.^.hf LiOLL HULntCHNigUt BIBLIOTHFOI^ DEI'ARTMKM OK IIIK IMKRIOR Hci\ W. J. KiKHE, Min.tUr. \\ U . Corv, C M C , Drputy M.nfttrr. PUBLICATIONS h vV Dominion Observatory OTTAWA U ; Kin.,, I M ' . , I.I. I),. Ihrtrlor. \'ol. I, No. 6 The Spectrum of Nova Geminorum BY J. S. m.ASKKTT. B.A., D.Sc. K.R.S.C. OTI AVV.V ( ;<)Vt;i(NMKM I'hintim; Hvrk.m 1 '• I :; ■||11. -IM,( IIM M tH N()\.\ (.I:MIN(>|M W in .1 - I'l.A-M'.n It \ ii.si .. K.H s.c. Tln' new ~tMr ill the c't(ll!innii ( Irniiiii, li A till I'lm Dec • J i:?' about •_'•" south (if " ( ii nuiiiiniin. whicii \va> ili-rii\ crcil li\ r.iirlio iii I )ciiiili:is-. Norway, on Mairh 1_', I'tl'J, uas aiiiioiii'.rcil li\ Irlc;ini|ili t'foiii llarxafil t )l)>(.|-\ atoiv on M;i:i-li \-> TImk- wa> ^oinr mi-take ami ililay in the lir-t iiir--ai;r, -o that no spcciia uciT ulitaniiMl at Ottawa until Marcli 1^ It i> iinforl iinati.. owini; to the niaiki'd cliainics that lia\c occurird in the >|icctnini since liiseovery . that some eai'lier plates were not seeiireil, but tho-e since obtained -how very eonsideialile cliant^es in the nature of the emission and ab-orpHon bands which It is the putpose of this publication to describe. ( »iilv -e\en spectra of the Nova have been pliotoy;ra|)lied licre. thri'i' on March is. and one each on March _>_•, 2:i, -'7. _'".t. Tliese were all obtained with the sinnle-prism spectro^rraph of the Dnminion Observatory, the one renuhirly emiiloyed in radial velocii> work, which tiives a linear dispersion of A.\ ')\ per millimetre at 11 . The observing: data are >ilveii in the following talile. DATA or UBSEKVATIUX I'lfiif .NiinitttT 4K«2 tsUH I.S94 49(Hi Hill (; M l)!ltc 1912 March IS M) » \s (i;t " IS (17 - 22 Xi ■2.1 .'■.4 " 27 .^)(1 - 2y M Hour \nti!c l)ur:ttiiin of :it Krui Kxposurc Komarkfl h m. 2 11 211 :i 4(1 ■) ai 4 115 3 0.^) 110 .'ill 1.') u:< 120 1.50 Partly iloinlv ami hazy. SoiMtiB itiiiTovcl SciMllti un;>rn\('ii, J^oeinK fair Sccinn fair Cloudy and poor. Windy. ' The isMimii uf this pai«T ha.^ li.-cii long delayed after its writing on accmnt of the rlianKc in the method of |iiil>li.sliinK the work .if the OlisiTVatury IMI I'l Hill \iii>\^ iih nil- iiii\(isi.is .iii-hnv \iMii^ A f(iin)i;ii i~nii 111 tlii-r |il;ili- >liii\\- lliiil. r't liuiiiili :ill -.tv nl' ilic l\|iji-;il Nova lorm. coii^iilrriililc chaiiKt's liuvf i:ikiii p|.i>i in ili.- iIimi.kiii hI tin -pcctrii iilil;iiiif(l wliii-li cMii Ik ili\i(lii| iiilii time ui-linr? I \ pr~ 'I'lir lii-I of ||m-.c iih'IikIi - |il;ilc!< 4Wt2-:i-l ina.li' "i, \I:iiv|i Is Tln-i- -|irctr;i ^liiiw fiiu>-inii liMii'l- 'it li\i||(inrn lii'liuni :inil c'.'ilc'iuni ;i~ well m,^ a iiiiinlH'r of taiiitcr liaml- wlmsc Driuin i- um ri tain I'Ih -iidiiLii-t ni iLr^r liaml-. ilm-r of tllf i. ) MIiil -^ lilii'- of hydidncii, ^liow ilmililc iiiaxiina ol Mil(li-ll\ at llic- ini ~ii|c of" flic l)!iiiil. aii'l uliili' tlii- iloiililr ina\Miiiiiii i- not -Imwii (in ihc otlni- all tlir liatui- -iTin -linnui-r on ilir -aliir -nIi Thr ali-oi pi ion linc^ oi IimihN ii-iiall> ai'i'oinpan\ ini; tin iini->ion in tlir -ptciia ot \i vai- air, lio\vc\cr, \('r\ faini ami (lifTilM', liari'ls riroiini-aliic let alone ai-cmalcK nic a-m aMr on ihr plati- 'i'JH' ('(ititililloll> '|K'ClniIii i> li'lali\il\ -tioni;. aiicj ihr ninlia^l lirlwccn II ami ttir m-.'iiluallN -hiiiiril cdi:!-- >i\ tlir 11111--1011 l.aiiil- I- iiiii -liaipl\ niaiknl. nihlii- ili|i It clilliciill 111 ci'llainlv ililiitnllir tin lioumlal 11- ol ihr lallil \ ipiliil.ri- of more or 1<>» -liarii imlallii' ali-oipiion Iiih - air aUo prr-cnl, tlir 11 ami K of calrinni luinu opmalU will maikiil whit' ilii iiia;im-iuiii /l|s| -oinr ihrcr or foiir o| iinii, aii'l othri- ol iiiikiio\\ii uii'^in air in ilrrrra-iiifi oiiirr 111 ili-lilirtli('». 'I'llC SCColi'l III llir I > pr- i- follow il III plair- I'.llll ;iml I'.'lli olilalliril oil Ma''rli s2 anil J.'i In tliri ilir roniia-i- lirtwrrn luiii iiuioii^. rini~>:oii. ami ali-olplloll ~prrMa air llilirll nii'li -lialpl.\ ilrlinril alld alllioimll lllr ront unions -prrtr'uii i~ alioiii ii|iial in irlatixi iiitrii-iiv 'o llial in tin ln-i I \ pr. ihr procure ol -tionii al>-oipi inn linr~ iru'lri- the iiira-Mirini nl ihon rntaiii aii'l aciairatc. 'Ihr ''hal acin i-l ir Iralill'' of tlir-i plalr~ i- ihr -trnliii. liioilrlalcl) luoaii. ami -lialplx ill tilinl pall of al'~oipliii|i hlir- at ihr rmlil -lijr nl nio-l of tlir rnii->ioii liaiiiU whirh -liaili off ;iiai|iiall\ on tin inl -iili .-" pi oiioiinrnl ami licncralU p|i\alilil air lhr~r lim- that a faltil pan ~rl\r.l in pio\r ihr pirvrnrr of the hrliiiiii ' 1 17-', w hull wa- lint armn.paniril li\ ali\ \i-il'li rnii^-ion Ihr Hallow ali-oi'pi Inn liiirv II aiiii 1\ ami two or ihrrr of iion air --tili prr>riii. 'Ihr pi inripal chalitir ocriii riiifi in ihr thinl l>|ic. pioriil in platr-. \\>22-:i oil Mali'h _'i aliii J'.l. I- ill'' iiirira~inr rolilia-t Ik Iwrrii 11 ml iniinii^ ami rinission sped run I. I In loiinci lia~ lircoinc iclali\r|_\ wrak ami po»il)l_\ for ilii> reason lilK. Hl'K.i MM \1 "t 'i^N i.!\llN"l;i M I HI thr sccdiHi (itir Mil '■r .it |>lniii llii. ~ I"- ii:i~ ■ii-,.(i|" ., I'lic III1I-I..II l.;iii.|- iM'U (oii-iM M, I Mronn. ^Iinrply 'l''fiiic\ iIm- diaia.tcr ut all llic~c -pc-i'lia can lie ulilaiiicil I'fniii ihrii rc|iiii 'ucliiin«, a— i-lcil li\ ilic intcn-ll\ ciii-\c- ilrawii liniii a|iprii\iMialc \i~iial i-Miinaic- uii ihc riuiiic Iml a .Iclmiic i.lca nt 'lie pi.Mtinii- nl ilic l.aml- aml line- ami ilic ivlatl.ni- m itic -iicci-mm- l\pi- can Im-i I" (il.laincl imin llic lhca>iirr,~. uhicii arc hcnuilli lalmlaicil Mr \-i l!Ks ■ 4MW .1 49l)t'> 4»I4 WTJ net Ml- in< i{i'iii:irk-i ,-.017 :i rii.Hi I li.l.'iii 7 I'lWI I'liJ Isst I, 4S71 1 4S71 a 48t» IHfiO -1 l-^f.' 'i i:.vi I. llllll I ii-,:t;i s ii;-js ;. Hill -.' .viiu » sow il .'jwi.l 2 I'Kli J r.ill i t'llii I \'»*\ 'I 1M7 2 I'll.; I I'll! .1 I'Niii ;> l^sT ■. 4M7 '1 4s:i> I 3030 4 mm r> I'lTI 1 I'lV.i -, lli.l'l c I'.il.i J l\S!l II t>77 :; IS7-J > l'>i.l 'I IM'.i II IVC, 'I I'll I l>7s II l^7■-' ; IM,,; >. isi7 :. |s.ili J lu>J 11)71 tl)2N 11)11 4 4liO>.li 4r.iK ■> 4tiilti .VWIi '.IPlll i:i'ii I'i7n I'liii I'lil I'HNI (sn7 |s77 ls7-' isi.l |sl7 ;s:i7 li)2S Cm Ki„ Al- Mis M .ft Mill l-;ii.l Kill . \i.- Hi.j M'- lii.ln 1m,. 1 l-,iii l.in l;, i; 1 1 IM IjM i 1 11. 1 l),-f H.-«. Km |),.f. Kii.l Km , Hr.l \li- Mi l),-l Hm. KiiL. -Ml-. Line.' 1 )ff. Ilirn':l- l.im-. .\l.- I. 111... l:ii.l. It. l-:iri , Ml- l.iiK'.' It \l- 111 Iii.lc-f. lni-ri-:iM-. H.-tt H.l. I TIC r.'.-i.-^i* m Km Mux. Km Kt, .\l.- IM M:i\ Km. Kml Km., .Mi> l.ii..- .\l>- Mill' It Ui2 ri m h viiiis- 111 iiii, iiii\iiMn\ iin>i.i(\ A H Mil Ml, \>1 HI> roiili iiiird 4S92-;! 49(X> 4914 4922 4596 5 4.T.H s 4589 .i 4..70 7 i5lis 1 1572 3 451.2 11 4560 1 4556 1 4545 2 453>( 1 452H 2 454H 3 4537 3 452H 1 4522 : 4504 .s 45111 7 4503 9 4496 2 44hl 7 4451 U 1459 5 4449 li 4405 3 4392 9 43S9 7 4:172 ^ 4371 (I 4357 4 i;C,2 II 43.V) ^ 4342 2 4339 K 132V .'. 4325 9 432C 9 4301 42Wi 3 4249 5 4234 .. 422X U 4221 '; 1190 7 4177 7 4I<>2 I 4123 3 4115 II 4112 2 4110 1 41U1 7 tliHi J lll'm 7 4:1X3 432^^ 4319 II 4222 3 4123 2 4115 I lll'm o liM 1, 432s 7 H2II I 4101 1. m^m I. 1IIV2 .; 15S.S 7 4.'.7I 7 4531 i 2 4365 3 4;),54 5 4349 9 4341 II 4i2',i 7 1317 7 112". 11 I I II KU lOM 4g2;( 1597 I 1587 2 4571 1 1560 A 1534 7 lis] II 4365 9 4354 2 435> 4329 5 431.S 1 1121 J ■nil .1 Meftns 4596 s 45!>.>> I 4571 5 4-62 II 45MI 1 4516 7 453s 4 452s 2 1535 I tlsl .1 4459 5 4450 3 Kcmarka 112) lilt 1101 H.-t 1,11, Sir. .UK Miix In.l.'f. Abs. AIh I. mo All- llllr li^K Km M:ix \t.> I. inc. .\l»S. l.lllf. Km! Km , All.- I in. .\bs. l.ilu' \U'f Km H.I .\l,- IM .\li- l.nif Kh'I Km . Al.-^ I.inc \b- H.l Ah- i.inc ..Mb 44sl All- I, in.' I.in, It .\l.- I.nu' It. 4405). H. Ab^ l.mo K.-. 4405). Kt Ab.- I.ini. Ke. 4405) Ki .\l.- I. in.- (IV. 43831. Kt. Ab.-.. l.mc (Ko 43S3 4.36.5 6 4:».54 1. Ben. Kt. 1 IM In.-.. Cm ;.-.. 1 ■In. 4avi 7 Mux Km 4311 i; In.l.f .Mm Al ,- 1.1 432s 9 4.ils s .Abr.. llllf Enti Km. , Ab- l.m. .\b- I.in.. IV 4326 Hi-B Kill .Max Km Kii.l Km. B.l H.I. B.l. ift.l. fft.l. 4248 9 4221 9 Ili-K Kl 1 Mux Abs. Mm Kn.I Km Abs Ui>K Km. Abs .Mm Kml Km ift.). Iihm 1 liisl s In.l.f H. li ll I'.m D.f In.T.'iis,. Km Ab l,im Mux Km In.l.f .Mm , Al.s I. inns .\b.s. l.m... Dif. Kii.l Km. .\ba. Line, End Kt. Km. I' II III! --I'l.i ri!i \i 111 \ii\ \ i,i:MiN.S 7 ;i9')9 1 :i!i."i.s :i .■i!».'i7,."> :(!i."i 3933 8 393.1 s .3933 > 3922 (» 3922 3 3914 9 .^s7s (1 3.S7H 1 :l,s7ii 1 :iH7it 't 3983 I) 397S 7 39. l.ini Aba. — absnrjitinn Beg. — beKUinmu Bd. -banii Bni. — bruad I)pf. — dpfinilc \mUiKVl ATIONS Km. -omission It. -r:imt Irvlff -iniiftinite .\I:ix. - nmximurn .Mm. -niinitnum Kcsiilcs ilic iiifas.ircs ^i\fn aluur. nirasiirc< of a nuiiilicr <>!' sharp atj.sorpt inn lines used in lictcnnininn- the \i'ii)cil\- nf tiic ah-oiliinii alinnsplici-c air i;i\rn in the tabic i>i' vciiicitio liclow. .\ lew olluT faint alisorplinu lines, prrsent for the most part in -pretra »S(fJ-:^. were nifasurril. Imii as iln. were vci'v faint and uncertain, ami cnuld mil lie idenntied with an\' elements which cuiild reasonalily 111' expected Id lie present, and a~ sdine are likely due to photoy,raphic detects in the lilrn. they ha\e not lieen ni\en in the tallies*. The ililTerenI liniup- of emission and alisoi'plion line- and hands are separated hv means of space- in the [irecedm^ talih. iniiicalinsi as far a.- possiiile the coiuieclion of the measures. Some of the data contained m this lable has Imm'Ii further classitied and j^rouped in the foUowins lahle lor the purpose of deterniinint; the normal wave * Al (111- liiMc .11 wriiiiiK, '111' work of Kii-Ui.t iiii'i IooIm-Ut mii ih.. i.lchl itif:il urn .il -oiiu' of llio iili,orplion lin.-^of til.- N.mi with I 111.-.' of linlnim. miii of N.-u .11 jiml Sir:ittoii witli ili^jil;!.'!'.! enli:ui.-i'il lin.-. hail not ;.,,(intrp.l. Il>l iMiu ii \ I icN- 111 i iiv 111 'MINI' IN 1 iii-i,i:\ \ I' ■l:^ Icnulli- iif ihr sdiiici- dl' I'liii-Muii ami :ili-ni pi mii |>ii-i'nl I'lir-r i\mi l:iliU's scrxt' t(i >liii\\ lliai allliniiiiii ihr cliaiarti'i- nt' till' ~|irclniin lia~ rliaiiui'd iiiali'iiall\ . tliis 1. railiiT a clcanuv in lln' nli\~ical ('1111111111111- pn k liicinij, ilir -prciia than aii\ rliaiiiir in i'iin~t ii ui inn. Till' \\a\r li-niitli- 111 tl, piini'ipal I'lni-'-inn lianil- lia\r liri'ii nlitaini'd l>.v cninjial 111!^ llii' nii'a>iiri'- ni' lln' illikmiwii liand- with lliii'~r nI llic liainl- wliii'li wr ilctliiiich kiKiu ai'i' line in iIh' -'. ; ami > lim - nt' li\ ilnin'rii If wf rxaniiiicllir spci'tia ami iiiP'n~i'\ I'lii'x 1'- ill' till' thrrr Li,i-iiui>- 111' 111 i-.i'i'\ aiii 111- in till' ai'riiinpaii\-in(i liiiiii'i' \\r -I'l' iliai I'arli kmiuii i'ini-~iiin liaml in rarli liimip lia~ ileHnitrls' incaiiii)ii> in iinkniiun liami^. wliicli arc t'i'i'i|ii"nt 1\ I'alnl aiiil aUn nvi'llap mir aimllii'i'. cnalili' till' \\a\i' i'lltilll nl' tin' -nurrc 111 111' arniialrlv ili'lnnilnril I nr rxaniplr we find in llii- lii-i tiriiup plan- l^!^_'-:l . iln' li\ ilniiirii riMi--iiiii. nui-i-l iiit: nt' strum; lirnail liand- almili M).\ uidr wi'li l'airl\ ilitinili' I'lk'r^ and lia\ iiiu a udl- dcfinnl dmililt' inaxiinnin al llir rrd riki' al'iiMi H'A tiiiiii tlic mirinal pu-itinn nf ill,, llii,.. In llir MTiilid urnilp plan- r."i shadini: ntT iimri' nr lr-< madiiallx in ilic ml Inn -liurpiv liiniii'd nn tin' \ inlci side li\ a pair ni -trniiti ali^nrp'inn lim-- almiil \n\ apart and tin marc-t almut 12.\ tn the \inlrl ni llir linrnial pn-ilinll III llll' tlllld iilnlip plali'- I'. !_'•_'-:> ■ . I lie i'nii»iiin I- rnnipii^rd nf a -liniii: rriitial liaiid nrarl\ ■'<>l\ v.idi'. Iiniili'd al li'asl 1,1 till' \ inlit 1)\ an aliMirpiiiin linr and \\itli wiaki 1 -1 ri|i- I'lA w idr nii larli -idr Thrri' all' trai'r- al-n, I'^pi-nalh in tln' tir-i and la-t liinup-. nf limad faint all>Ul')>tinll lint fal' finin l||i' llnllnal pn-ltinll^ nl llir lilil'S. I'lnri'i'diiiii ilii'ii In pilmlaii' tlir-i I'litiiia ill paiaUrl rnlimin- with till' knnwn waM li'imili- nf till. ;,; and -^ linr- uppn-iir, wi- n-adilx nhiain tlir \v:i\i' Imirtli- ,if llir iinkmiuii rini~>inn- finiii tliii'i' -iiiil'i'i- li\ dirrrt prnpnrl inn. inakiiiy: allnwaiiri' fnr llir I'liallLli'" Ml Wldlll ,'ind di-'anrr a-- \M' pinr 1 alnlli; till' -piriniin. \\ I- tind till' M'l'N riirinu- irlaumi |iri'\ inii-l\ mund in Nn. a I'l-r-ia*. iliai tin' uidtlis and displanimnt- nf ilir l>amU arc dircrlK prniinri mnal in 1 lie wa\ r Icniitlis. The \aliic- nlitaincd li\ i|jc-.i' ihicc mcthnil- all i;i\cii in p.'irallcl cnliinm- Inllowcd by ihc Wfiglitcd ineun. ilic pmlialilc -niircc and tlic 1 rue \\a\c lentil L ' Ciiinijbi'll A Wrintit, A»trii|ihv. W I. kriovMi l)ri I mill ( ..m|iiiti-il Pair nf (•oin|.iili''l W.I., fmm li.inii- K.H r.ui.l- .503B .-. I'I'H. I l'i.",c, 7 I'.lln '. I'll I s KiD'.l I.V.Ili (,•71 I.Vili I t.VN 1 t:i4(i r. 41111 (.'.mi II t.i:>4 ii l:fjs 'I l.i.'ii :i IJls '1 I/-J1 'I ir.Ki 7 111. -J I 111 I ^ lll'.HI 1 :«iM 1 :w,>H :i :«i4!i ti :)> IIUKI 7 4> 17 <■> 4H37 (1 4ti(m ■« 4:)n'i "i 4o7l ■". 4:ii.2 II l.-,.^^ I t.VJs 2 4.'. II I T 4,Vi:t «.' 44,J9 .i 445(1 :i W I. Iu',111 I l(l.s| > :w.')ii I :)!»22 2 :«il t '.> .i,s7> 2 :iK7l> Ii :'.s2ii ^ Mil WciithtH NlrMI! W 1 »Mil II I.V)II> i.",r.i .", t,"ii,'. :. t.V21 Ii 4.V2-2 1171 2 lini .; •tiHiK :i :t!i:u ."i ;is.s7 *^ 1227 II .1(117 I) 4«7:i' 41124 :i (Mil :i He Normsl W I. .■•.016. •022 2 t :. l«24 - i-m n > l."vlH .i 11 t,-.44 4.V20 7 4471 2 11. 4(71 7 i;ill II 11 i:UII li 4:iOti ' 4-22fl .-1 Ca> 1227 417i; ' 41111 1 II mil II :59fi9 3 II :w70.2 :i9fi8 11 393;M Ch 3933 M 3)«7 K II :i»<9 1 :i.s:{.-. s 11 3835.6 'I'lic l.iiriiKiiit: iiililr >li the uniiiistakiiMc presence of tlu' hydrogen series from 11 111 11 ini'liisi\i' ami >>\ ihivc lino of lidiuin >-.')(U(;, l!t22 ami 4472. .Mih.iimli till' rn!ii|iiiiril waM' lcii'j:iii- of iIh' tii-t i«ii aiv siinhlly lircater tliaii the miriiial. ilii- i> mil to lir womlrifil ai wiu'ii tlirir faiiitnes.s and their position near KK. ., „i i. \ii..\- III nil iHiMi\iii\ MH~r,i;\ M'liiv ,1.,. Innii 111 ~,i>Miivcnr>^ .11 il,.' i-lat.,- i^ r,inM,lr,v,l Tlic |..iMti ,f > 117-2 for uliirli III, iviil.-iicc III .nii>Mnn appear- ami ul.irli i- .■umpulrd nu\\ I'n.in thr faint p;,ii olal.-oiptiiu, liiH-ni, plair IMl L^.iv..- mia .'lo-riv uiii,tlichunnalaii.ll'..iin- ,.,„n.lH.iativr iMii.'nn ll,a! il)- ntli.T Iiim> aluiM innii Hiia'd aic .iiH' u, licliilin •I'luTC i- a Iio--ll.illt> llial tl.r line rulnpillni at l.".tN max I'r ,iur Id iIh' line ».>1 1 .,,■ ,i,r ailililion:,! hydvniiru mth- ami aUu iliai Uh' laint liaiul at H-J'.".:. mav !»■ ,iur Id ralciuin a' I'-'l'T N" ulriit iticallnii- uiiicli Mrini'ii pn.l.al>ir liaxc -ilt:u«--I''ii ihiin.M'Kr- tor ll.collHT lilM- ami llirx aiv l,rnrr left mirla-llln I , HI tl,c I'.t |,n,l.al)lr rnu-Miin ami al.-iip,„,n liam!-. w,' liavr .1 ilm 'n liviliotim, :; tn liHniin, _.. ,„,..mIi1v :;. Ill ralruini, ami pn-ihlx 1 m llf aaiiiiidii'.; ii,Min>;;<'n >.tic>. Icaxitit: *'i iiitall> iiimiriiiiln'il I, ,„u>i 111. I 1h' li.iunllni, linwrvcr. thai w.' liaM' a iiMtnlHr uf ^liarp ahMiiplhiii liii- Wui In ralriuni. ina-iicMMlii ami iimi ,.,il\ -ii^lnlx ili-|.laiT,i fnnii ,1,,,, Miiniial puMiiuii-, prnl.aiilx \'^ tia' nidiH I tli- -'ai m tli- line "I -i'^ilH- 11,, M'l.inllr- Lll\eii l.v rarli of tlic~e lua- "Ull li"' 'ntaii Nrli.cltir- n\ tlir piatcS ami llir c.invctni vdncitir- UUli n-p,rl to llic Min air -IMH ill the arruliipailV 111- tal.lc. \i.i.iHirii> iKiiM -ii\i:i' \n-iini'ii'i\ i.iN!;> ISTJ ivi:; I'.HH. VUI 1922 4923 KlcTiuiit VVavi l.i'IlKtl \\< \.: W 1 \. 1 Wt.' Vel. Wt.' Vel. Wt.l Vi-I. Wt. Vel. VV- I.V.''i ■ -' 1 1 • i; :< ■ i" •' 1 ■ M ^ Mk 44^1 1 ii'i ^ :i 11 ^ ... , F,. 11(1.-. ] ■ .!• ' K. i:iM ' .' \~ ' Kr. 4:tL' . . ., .,, 1 ■J - ■-"! ■( ■_' • 1.) (i C;i :iWi'.t M .' '^ 42 - '.'- 7 '.'* .'< (.'a. :*'••'< 1 - ,1 : :{ ■"'- -' 1 ill \Vf(l Mni.i . :.i :. - 1^ -• ;i 1 -r2!t :■• -2<.» '1 l.i I'l ■J'l !> Corr. to Sun _"i 1 1 ,i - 1. • Ki 7 ltii.1. V..| J J , Tlu- in-aii Mil -liH- aiv nl.taiiieil flniii <'niiH.i. niin c'lilv ilie 11 ami K lilU'S, .,. ,l„.x ate ti.e uiiU i.iir- that aiqieai II. all ilie plan- ami a- ilie.N are liv tar the 1,,,., ;u,il -liarpe-l al.-.rp'Min lim- it i- pml.alile ilial >l.e iiieiiMlira Moll of the line l.VJ'i a- llie inni Hie I.V_-^.7'.^^ 1- not e.irrerl. lor 111 orilei lalve llie V.'loritV II, i, -l'l.< 111! M "^ N"\ \ ..KMIMiUl \l. Iln ,,„,,„,„„. „„, ,.,„„p..„.u,.,l 1. nun„..u. ..o,n,Kni..n ..,...,.<.. th. .vluUv. .rn„- nnn.lu 1 .l,„nl,l ,.., 1.. Uu.. U w. ..on.,!,. ,1,. v..l,.,.,tv a< . ■„„..„. and ,ak. ,..,nvM.und ui.lMlKU ...n l.v U,,. u.lH. luH.^ .!.■ uav. l.^n.U, ^w,ul,l 1... .,nlv ahnu, ,V's 1 •l•lH■.na..H-P^nl,^^M.,■„.aUo,.,.,^.■.lM■n,>a^. ^alu..OM, a-.l,.lm. .hn. :u,.ln..t^,■n^l,a,•p^ .l.tn,.,! on . l,r m-'' ra n ,^ n„. m,,,. M... Ih-.s , .,.,,nod.,ul,. m^.vn.^aUK^,l.■,•..~-l-p,H..,allH^.•alnun. n...n.^,urn. ,,„„ .,.„„„„„, >„ .1,,. M.T.nun, ,.m,lun.,l p,v.nnal,lv l,v a lav,, n, nu-alh. ^^,,,,,, .,,,,,,,,,,,,,,, Un- l,.'.r .iH-an,l..M.,.nM,K.nKd .In.l, .n,.^ n.. u, n. ^ and rnniinunii- -pccirinn. „ ,^,„,,, „,,„,,, ,. W ,hi. ■n..,allu. a-nu-plHT.. .a. varvin. in vWity. ,,„„„„,,. , ,,.. no, ,-„nMd,.,- -iH. ..vi.l.nn. a~ <,ni.. M.Hu.i.n, ,„ pnn . ^ analuht v. ; ,,„,,,.;n,...il,l,. uul, U. n.n,p..anu. .a.^ .!h.. was a .n.a,, ,■ fall nf ,,.n,p. ra.un ,,,,,, :,,.,..,,1,. dunnu >.n.. uf nn. ..xpoMUvOnn a> i. .a. alwav.mU. ,n.^^^ di ;;,:,,,,,,,, ,,,v„,. ,lHOa^, -wo iKdi- ™.^ wMuHl a v,4onn of r.^^^^^^^ U,„- p,.,-..rund. ■n,.pn,ha!,l,...m.rnrapla„.tl,..nn,n..~,on,.arly(.km~.p<.r _,,,,. .,n.-l, . nun.lMn,, Inul, iuMh,. H.u-aH,. nMl,,. I,n,.^ n,,a..nd and ,n..,r i,„,,,,,al airnTUicni in 'l'" plal'-- ,,,,,,,,,,,,, ,,.,U. a^ ,f Uhov nu.iu lu. a Muall ranu,. of v..U..itv V..V n,u^^^^ ,,^ ,,_^^,,,, ,,,,,,,,,, a. UkO found HMlH. da^> of MH-n..opi,- lun.n..^ u, wh.^^ „,„,,„„.„,_ ,.v.. a h..h ran., of ,.,o..i, . and ,1. ^harp H and K a.v .U h.r ,„„.ian, or vary ov.t a r,-lat ivly !ow ran.'. , ,■ 1 .,,■., ,.f -iv ol.taincd ironi il.c MK^aMiu'.- ot ■ l^ P""a M ,. .1, is -Old March _".l inclu-iv.' may bv N.,. 2 photo-rapluMi luMw.rn Match 1^ and -Mai suiuniaii/'d a> follows. .„„;„,.,, n, ■■ ..' ' '» '■■ ' ■"""-"■" ' '- "■ 7' :,.„.;,„.„ - U.- :»"v -■". >*■>'* „„ ■ v„„H >i.l.- i.y ,»;,. 4 >"■...« ™-'> '.' I ■"""" '^ It is n lu.i' \ihi\- "I nil- ii'iMiMiiN iiit-i,ii\ M'lia !■ ( (iiilinilou- -|irriiiiiii \i'i\ \\c:ik, c|iii->iiin IimihI- -ih'Iiu aiul -li;ii|>l\ Imnird ;,, l„,tli -hli-: all ali-(.ipnnii liiir to th- \ iolcl -idc lullnwcil li\ uiakcr riiii--ioii ami aliiMit tin- -atin' whI'Ii dl' weak i liii — icn nn itir ic'l -nlr. ■J. Till' tnra~Mlr- 111' thi'-r ~|H(tia -IliiW >i\ l>allil~ du.' In ll\ ilrnncli. thlir ti, lifliuni. iwu In raliauin. Umi i(ntaii\rl\ iilriitilK .1. -i\ ni' uhkiidwii niiirin. :;. Till' tiira-iin- of tlic ^liarr. ali-ni pi kjh line- n\ calcimii. inamir-imn aii M'lu.'iiy i- iioi cuii-iaiil Iml \ari(- "S' r a ian;:r (,I ali.nii l.'ikiii-. per -cimimI Tliciv I- link' U-c 111 -piMaikililiu alniiil llir pli\ -ical rail-c nl llif piTiiHaiH li'S ,,, tills aii.l "thrr Hiuilar -prctia. It Mriii- iimM impinhahlr iliai ilir wi.irnci mii-lnn ami 'Ih' laliii'lx (Ii-plarr,| aiiMupt imi lilir- alV <\Hr In InnlK.II uf Ihc t:aM'S in th,. Ilnr .if Miilii wliirh u.iiiM iv,|iiiiv MJiiiatlc- n\ ihr unlcr ni a tliiHi>aiMl kill mil 'tn- ■riiiTc 1-. liii\M\i I-, one pliriKmiciiiiii in arrind w ii li -m-li an li.\ put lir-i-, wliirh is. thai tkr \\i.lih ami .li-placTinrni aic pnipmi iunal u< ami \arv with the «a\i' l-'imlli. a ruliilillnli wliirii i:i\(- cillial \clncit\ \<iii-t . (•(illi-inii. 'Apld-iim. n? whairMr n may havr licrn. lias -rt fivi- -litli.-i.ni .iiri-iiv III inciva-c the liiihi iiivm win li\ ihi- ImhIv . pniliahly ot thr nvdi'V (if (lUf -nil in ma-, tlmii-aml- nf liim - in a fiw li. -.f^. il .MTm- hnpclcss friim an\' imi-trial cxpcrirnn' m aitrnipi i" tAiilain the caii-r uf the chai-actrri.-lic MHM-tMiiu ami of tiir chamii- that nriair in il. W '■ nm-t pcrt'oivc l.c nintriit to ,a|-rlull\ uli-iTM' all pn-Mlilr plirii, ,|1H lia ill liif linpr llial the UiyMrry may fvciitually 1"' at lra,-t partiall\ clraivd up. DiiMINION ' >H.~KKVAT.