

Note on the Spectra m <>f Silicium. 



DEFINITIONS OF STELLAR (}KM:::A. 



Argonian. 



proto-magne*ium, proto- 



Predominant. Hydrogen and proto-hydrogen. 

 Fainter. Helium, unknown gas (\ 4151, -4157), 

 calcium, asterium. 



Alnitamian. 



Predominant. Hydrogen, helium, unknown gas (4G49'2), silicium (IV). 

 Fainter. Asterium, silicium (HI), proto-hydrogen, proto-niagnesiuni, proto- 

 calciuni, oxygen, nitrogen, carbon, silicium (II). 



Crucian. 



Predominant. Hydrogen, helium, 

 asterium, oxygen, nitrogen, carbon. 



Fainter. Proto-magnesium, proto- 

 calcium, .-iiirium (III), unknown gas 

 (\4649-2), silicium (II). silicium (IV). 



C Tauriau. 



Predominant. Hydrogen, he- 

 lium, proto-magnesiuin, asterium. 



Fainter. Proto-calcium, sili- 

 cium (II), proto-iron, proto-tita- 

 nium, proto-chromium, nitrogen, 

 carbon, oxygen. 



Biyelian. 



Predominant. Hydrogen, pro to- 

 calcium, proto-magnesium, helium, 

 fcilicium (II). 



Fainter. Asterium, proto-iron, 

 carbon, nitrogen, proto-titanium v 

 proto-chromium, oxvgen, silicium 

 (III). 



Cyonian. 



Predominant. Hydrogen, proto- 

 calcium, proto-magnesium, proto- 

 iron, silicium (II), proto-tit aiiium, 

 proto-chromium. 



Fainter. Proto-nickel, silicium 

 "i (I), proto-vanadium, proto-manga- 

 nese, proto-strontium, iron (arc), 

 helium, silicium (III), asterium. 



Acherniaii. 

 Same as Crucian. 



Algolian. 



Predominant. Hydrogen, proto- 

 magnesium, proto-calcium, helium, 

 silicium (II). 



Fainter. Proto-iron, asterium, 

 carbon, proto-titanium, pro'.o-man- 

 ganese, proto-nickel. 



Markabian. 



Predominant. Hydrogen, proto- 

 calcium, proto magnesium, sill- 

 cium (II). 



Fainter. Proto-iron, helium, 

 asterium, proto-titanium, proto- 

 manganese, proto-nickcl, proto- 

 chromiuin. 



Sirian. 



Predominant. Hydrogen, proto- 

 calcium, proto-magncsium, proto- 

 iron, silicium (II). 



Fainter. Tli3 lines of the other 

 proto-metals and the arc lines of 

 iron, calcium, manganese, silicium 

 (I). 



