[mclenxan-petrie] spectra OF HELIUM, ETC. 



29 



es: 









5:^ 



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00 lO (N O CÎ Tfi 

 cm' -^ d IN -^ -^ 



coo t- coco oo r- CO 03 iM CO --i cocoo>-*m 



loco d (NO lO'-' c^ioioocvc! cocidiN-- 



t^O O --KN (NCO Tf<TtiOOt>CV -H,-icO'J<iC 



r-t^- 00 0000 00 00 cocooococcoo oooscso 



>rt N (N O • 



r-l -HC4 >> ■-iO'-<i-0r-<,-l 





il I— ' 

 1^ 





tl.fe 



(N — 



