INTELLIGENCE, POWER, 



for man and animals in the north, as compared with a 

 smaller brain, a smaller heart and blood volume, and a 

 smaller thyroid gland, which we have found for man and 

 animals in the tropics. 



A detailed comparative study of these various species 

 will be published later. 



FINBACK WHALE, FEMALE (length 71 feet) 



Balaenoptera physalus 

 Taken at Whaling Station, Fields Landing, California 



Body fat, independent of muscle. 



332 



