[mclennan-petrie] spectra OF HELIUM, ETC. 



27 







ffi3 



J A 



4) |D 



(MCO 

 OO 



■* O 

 00 CO 



oo 



O IMOO COf) 



d d d d lo 



CM CMCO t^OO 



o oo oo 



-H Ol-H ^lO rt 



oil-- 



CMCM 



TJICSIO 

 (NNCO 



.-I.-1 .-1 IN 



00 O i-O O rt 



^^ « CM 



U 



ira -H 



O — I -< C-1 CO 



CO CO CO CO CO 



— d 



O --H 



(NCÔ-* 



