196 F. H. KnowUon — Evolution of Geologic Climates. 



Is the postulate of a dual lieat supply a logical and 

 legitimate proposition! 



These and other problems of similar import are left 

 untouched. Constructive criticism is always helpful; 

 destructive criticism is less so. I asked for bread but 

 thus far have received little but striated pebbles. 



