I'LATE rill Royal Soc. Trans XdiruTol Xfr. 



Solar Spectrum 



M v Swan's observations of the CarbolrydrogerL Spectrum. 



a 





F t 







1 





k 



b,b F. 









O ft C B a A 































































(arhn hydrogen 

 Spectrum 



MS' 



XT 



fig. 4 





HG.1 ', 



•iiu- 









ja 







p 







° 



.v# 



m7 l'ontons photometer.. 

 fig . 2 ; .!•//,• 





FIG. 



1 



Vr 



1 



p 







c' 





FIG. .'i 



FIG. 3 



) c 



Fro. 6 



I A-A.K. Joins Mton. EflxaVurgh. 



