iss 



X.-l TURE 



[June 



189- 



study of these stars at the Lick Observator)", and has obsen-ed 

 all the lines in the spectra of a much greater number of stars than 

 was available when I began the inquirj- : his measurements are 

 ver\' much more accurate than any that were possible then to 

 me. What hap|K-ns when we come to deal w ith his results ? 

 The thing is a thousand times more convincing than it ever was. 

 When we take Campbell's list, we get ver\' many more co- 

 incidences than we had when we dealt with Pickering's. So 



seems to confirm the idea. The great question is the question 

 of carbon. You know the imiwriance of carbon in a star like 

 this, because we have had carbon differentiating comets from 

 nebula-, and finally the discovery of carbon in the nobulv. 



I have some ap(xtr.ilus bore 10 show yovi, which illuslmtes 

 what one has to do in sludying the spectrum of carlxm ; we 

 must not only deal with it in its ordinary form, and observe the 

 spectrum as seen in the liunscn flame, and so on, but wc must 



Aug. 33. 

 1893. 



.Aug. 16, 

 1893. 



* 



Hi- 



Wi 



I 



iCassiopeiae: 



)RIONIS 



Fig. 27. — Spectra of y Cassiopeiae and Beliatrbc. from photographs taken al Soulti Kensington. 



that, the further we go in this inquiry, the greater is the number 

 of coincidences. I told you that in the first inquiry there were 

 nine coincidences oKserveil ; now we get nineteen coincidences 

 out of thirty-three. We are therefore justified in .saying that the 

 more these phenomena are observed, the more closely associated 

 are they seen to lie. 



I..et us take the ca.se of one of the brightest stars of this class in 

 Argo, the spectrum of a star w hich my friend Respighi and myself 



' I iii »i i w iii(Jp|WMiM|H» 



get different com]X)Uiids of carlion, and expose them to difl'crent 

 temperatures and different pressures. That ha.s been done by 

 myself and others : during the last twenty years I suppose I 

 have made thousiinils of observations on the spectrum of carbon 

 in different forms and conditions. 



Kig. 28 show s a series of photographs of the same carbon com- 

 pound in the same tiil)C, taken under different conditions ; you 

 will see that there is a very cunsidendilc differciue in the 

 intensity of the s;ime bands, as the pressure tif 

 i lie gas has been changed ; the |Mrticular |>art 

 'f oi^e of the bands which you see enhanced 

 -rcms to l>e playing a role of consi<leralile ini- 

 |iortaiue in the sjiectra of simie of these stars. 

 This is shown merely as an indication of the 

 l^iinl of inituite work wliich is ahsululcly essen- 

 iial to determine what is happening in the 

 Iteinical elements in these bodies, 



I, Ndkman I,ikkvi;r, 



474 F 



. iiii j i iiiiiHi iiSl'"4 



( To he coitliniied. ) 



/■///■; MAX. I uEMENT 

 EPPING EOREST. 



OE 



h iG, 30. — .Spectrum of carbon at ditTerent temperature*. 



were the first to see on a very hot night in .Madras in 1871, a 

 lieautiful s|>eLlrum with man^ bright lines. Now, here these 

 bright linen are indicated in the diagram, anti we find by 

 attempting to Mudy their real gmsilions that some of them are 

 <hie to carlxin, and vnne of them to iron, and sfime of them to 

 WHiium. I'riif. Campliell h.ts recently iiuludcd the study of this 

 star in his work at l.ick, and everything that he has done there 



NO. 1337, VOL. 52] 



A S a sequel to the continued agitation in 

 ^^ the newspapers alioul Kppiiig I'oresI, a 

 leputation was received by the Coniniitlee al 

 iheir meeting on Tuesday last at the (iuildhull. 

 The object of the (leputation was to present 

 ihe following memorial : — 



" N'ovir memorialists have heanl «ilh grave 



'oncern that your t'oniuiitlee have hcen urged 



10 put a stop to all furllier removals nf trees 



in Kpping I'orest for a period of years. The 



undei. signed have examined the area ijiipiestion 



and are of opinion that such a rcKihition, if 



! sanctione<l by your Committee, would be productive of un- 



I doubted iimiry to the Korcst, especially as regards those 



portions of Loiighton, ICpping, Waltham and ,Sewardstone 



I Slanors which are covered with a dense growth of pollanled 



trees, 



"Those who have approached you with the reipiesl to «liich 

 we have refctn-d <lo not appear to liavi- ajiprehended the altered 



