INORGANIC EVOLUTION. 215 



esting to notice the relation of organic evolution to inorganic 

 evolution in the scale of time as illustrated by Sir Norman 

 Lockyer. Fig. 52. 



30000* 



ARGON1AN 



ALNITAMIAN 



28000* 



ACHERNIAN 



ALCOLIAN 



2000O* 



MARKABIAM 



15OOO* 



SIRIAN 



PROCYONIAN 



10000* 



ARCTURIAN 



5000* 



PISCtAN 



OSM.ftlRID.MELT 

 IRON MELTS 



ORC.EVOL 



WATER BOILS f 



ICC MELTS I 



Fig. 52. Diagram showing that organic evolution occupies only a 

 point in the line representing the time and temperature range required 

 by inorganic evolution. 



