190 



Sir Norman Lockyer. 



Crucian. 



Predominant. — Hydrogen, helium, as- 

 terium, oxygen, nitrogen, carbon. 



Fainter. — Proto -magnesium, proto- 

 calcium, unknown gas (A 4089'2), sili- 

 cium. 



f Taurian. 



Predominant. — Hydrogen, he- 

 lium, proto-magnesium, asterium. 



Fainter. — Proto-calcium, sili- 

 cium, nitrogen, carbon, oxygen, 

 proto-iron, proto-titanium. 



Rigelian. 



Predominant. — Hydrogen, proto- 

 calcium, proto-magnesium, helium, 

 silicium. 



Fainter. — Asterium, proto-iron } 

 nitrogen, carbon, proto-titanium. 



Predominant. — Hydrogen, proto- 

 calcium, proto-magnesium, proto- 

 iron, silicium, proto-titanium, 

 proto-copper, proto- chromium. 



Fainter. — Proto-nickel, proto- 

 vanadium, proto-manganese, proto - 

 strontium, iron (arc). 



Polarian. 



Predominant. — Proto-calcium, 

 proto-titanium, hydrogen, proto- 

 magnesium, proto-iron, and arc 

 lines of calcium, iron, and manga- 

 nese. 



Fainter. — The other proto-metals 

 and metals occurring in the Sirian 

 , genus. 



Achernian. 

 Same as Crucian. 



Algolian. 



Predominant. — Hydrogen, proto- 

 magnesium, proto-calcium, helium, 

 silicium. 



Fainter. — Proto-iron, asterium, 

 carbon, proto-titanium, proto-cop- 

 per, proto-manganese, proto-nickel. 



Marlcabian. 



Predominant. — Hydrogen, proto- 

 calcium, proto-magnesium, sili- 

 cium. 



Fainter. — Proto-iron, helium, 

 asterium, proto-titanium, proto- 

 copper, proto-manganese, proto- 

 nickel, proto-chromium. 



Sirian. 



Predominant. — Hydrogen, proto- 

 calcium, proto-magnesium, proto- 

 iron, silicium. 



Fainter. — The lines of the other 

 proto-metals and the arc lines of 

 iron, calcium, and manganese. 



Proeyonian. 

 Same as Polarian. 



