, 1879-07-02

rrcn u,tlcr these fayorahln conditions. Int u
oxygc1, cxlstel III enormous Quantities wltfh
tic Visible clot,o ot the tun, Its prescnce might
hu rerurnzcn IN another why.
13csidcs iEr dark lines In tho solar spectrum. |
there nro bright lines ccrtninay nj times, and
probably niwnya. sone. indeed, have aaid that |
na tic glowing vnnors which prtNltlcc the r1tt1-
t,w.tfntel nrray Of lines Just Incnttnnc1 arc ut
nil times present oycr tie Rull'h Surface, thero
nrc always hrlCht lttlca; but m thu question Il
always Of re3ntiyr brightness, nf1 a: the.e rar-
/" 1ic dark itnes-tii4 mode 81 *pens'ms seem:
rs Incorrect NJ It NduId be to describe Tic t!ulE
tltsx ~ sl,ai red.t.ot gohc. sccn prolcstca oM
bright saek1r'l'ln' Ut white heat, rs fos,n,1G
white background. Whrn,. however. rs some.
tirps happens. tlc known lines Of knil1c element
disappear md presently rraprcnr as bright
lines. wo perceive thai for .lt ttmo bo,lg the
element is changed IN character. Wc know that
TINT element Is prcEcnL III the tnrt NJ tic aln
examined, hut wu kllow this because We sec
ns bright iss sua is tatE nss 81 o.
stance, III tic cnse NJ hydroact,, wien tlltso OK
ccel!neis bright parts OF the SUMS a!'rfase,
which are called .fdcA'tf, arc exhausted. For
'ss tstno being. ac hydrogen 'hcre, prooaniy 10
ib!c surfuce, Is glowing with hcas exceeding
lint Of the matter forming tue pholpsn'crc, re-
gatdcd ns whole; thus, thu hydrogen tndf-
very great quantities In ihr aun but always lay
below ahe Visible aolar 6ttflncc h'itt was AZ
higher tctnncrat.lro t1an tt.at nrsvaiil''G a. inc
surinse, then oHsEen lnlgMt ln1eatu ~ pres'
cntc by It's bright ines NH eonftt ceftaar ~
dcate y " no uttics TGy. Now' y 10 evtdot1ce
uf precisely this kind tbnt Prof. Drarcr sccms
to l'nvo obtn!nctl respectful. tsa m9st inportait
element: Ha had becn engagcu flnes lsa
| III obtan!nR simultaneous Pl!ot9srapns
OF Darts OF lhc eo!nr spectrum iliu ol CUTIE
spontllils parts OF tie spectfn OF hsaFoEch, MIRO
gen. hhl carop!l' IL SAahi!'',E seracn U. aue
photographs In wttcl, tlc. ttc'i spectrum OF
| RttroEon wns III (astaposltlafi WIN thc foiae
sneGtr1il; n ,oC1a feason 70 eiapeet tat sotne
Of tue bright lines OF nftfogrn agreed exactly IN
position win pr'eht oatlds IN Inc spectrum Of
| tile RIi
Pursuing his researches, he found ,cven at TINT
carly stagc 0s ms IaooEs, very striking evidence
of agreement between tic bright INES os oxygen
and solar Er!gIt batlt!s 1t was not, lloWeycr.
ill luz sear lot. snht ne "ta W. tat bn.!HitA aa
G pap,ff f tn, t n@"tivc" W. ~ i,a n,toiun
Gu'as.u ssn s - ~ ~. s 49, - ~ .,nu ~, i,i
J 81, ti ia ~ v,r .vtisn t,ic,, in .ais;ni 1,r,f
nar ' liz ,,,t ',ern,v sani nt'i,,r. ~
Ws sc onss ai see XII ~ tha ~" sar,,
Solves sss' ,s LII J pi"ft ;'", ',niu
re'a| ~ |cw rnisr,.ncc III Inrs nni ]cttrrs m1,5ed
, os ,hc ~" nsr to mnis tr, ill.,, intr11@is
II, snehe p!o."Et"p"s M st s, w. . sne npGItral a.
n the aun WIS sSen snug i, fls ,', W't w nf' s.,.
!iho allsetu'tt - al.' ttS oiItsnt 'Ipes " ~"
er rt t. i'1rats l vxet oErts,ucn. ] o. OF te lux
s;,s i,.ps ,rs,, ~, ~ t,rr,.',,,,,tiu, .n. III
ut.Eht n.s VIII w @ soi9s IT, arh !,s
lics' ESs!y nu & ~ '.'r IAftcla a'!G"t " M es Mas
seen 10 eo'hG,ac WIN uIlsnt parl u .nu so.as s
hpssltu, :" ,, au,e s"aS" ' ,t. .o '... ~ a., -
'cry h.a>'st , ."9 .nS - ,t % t. .i -, ~
speearn oI Js saIaa,' eaass a1as r. - ,n,m't
out ftat stoss,s ~ smassS..' ";cu, " s ~
Da1A ~ lni splus spustEnnl. tHl9 eaoss scssln-
| DlutlEC EpuHA HUI Al 1hGll tASt Nc AElU%H
actens.at t - ,ioa ~ 'Ga,J he ~ pS p ~" ne
r,a,i t :. t rr.s"o f ~
asS ,3 S w ~ ~. ,s,st e ~ ssuat
& y; "a t ps.un sns ~ a.ssu'o , "oa. WILL. e
lasc ,!,s ,s' r4 ~ ns ~, ia e1 u, rsaen ~
atter nassis sHr9ulin au1 eoo'eI cSt.upe nt 81
u.ae ~. H.. IN i ~,
ai'a must ue aGtsa " ac uosorpttse aet'"a. VI
hauutn, H. ~ ~ ts, Mn0 ns .ei, ~ rtf
WIN t!.e uAiEcn ~ M ."c y. III, nna m "ns.a i"..
Nrapcr oot"lne" LUG orR"'-nho cou'paElsoh
bPee'1"h'' ....--
Many, experienced epcctrnscop!sta remained
nncDhyli1eed ny thc evidence which l!o1 Draper
thus aafnncetl IN 1b0. '!l!cy considered that
the disperstvc pOWtr OF Ills apeetrosroplc bat
terry was not sufficient to place beyond aues
lion te coinC11saces OIL WINCH nc uaheu JUS con.
rluslons. Other objections Misc wers advanced
which nccu int here nc l~clt hpot'. 10 t1!e trttc
se1en'itic spirit, irot. Draper set 10 Work 10 ~
r,y innre Eearch!1lE tcst6 to h1s resn!t' lht
sSae snt Of ' a ee a
speGtrnt'.' lsose Wtlicn NC c1hl1lfcu lust trt
tany at the Astronomical Society were on seals
Tour times Ertater. TIE cvtdenco derived iro.i
each concidencr wns thus incrcasct! !our!old il
snlue, the evidence FROM two cotnc[1cnces s'1
tesnfold: frntn three, tixty,four fold; nn'l frotr
thu eighteen reco9nIzc!i eoineidcnccs about S.
@5,Wol times. ~ el'tsted, also, as, improve
troseoplc researches. i ecce.r IL spnrk, through
! nlr which gaye tue atE sneetr!la1, plrstled .
" z!gzaE COURSE Ike lgltns,lE-tlhssl on stunt
Bca!c. lic wanted btFatEet Hash, or at any rati
, itat lasa 50 that seen ffo!n hnc dtrcsslosl !
: shnlll npptar as atrnEht line. 70 Ing IN
vented whnt llc calls tho snnrk-e'tnprcssor I'll
terminals fctwcen which fl!e spurk passes nF
. Introduced INTO small block OF ss'apsonc, NM
: hesween them small, ilst aperture !s prepared
l'etwccn thu walls Ut whlu tue ELECTRIC t!os!1 On
+, to travel. This space Is lelt omen on nnc ale
somewhat Ike the slit nt tssoney.box, aud tn
spark seen from sfus sttl' necessarily appears
= straight linz. though It niny Eava cpnstlcra
G bic amount nt zlgzng pl"T III The plans OF tn
hut SPACE iest lur ~ passaee. Ing result