HEREDITY 



each cell of a living body, whether it be 

 plant or animal, has its own special pat- 

 tern. The pattern of a walrus' body cells 

 is wholly different from that of a whale's, 

 however identical they may be in chemical 

 composition. 



Moreover, we encounter here one of 

 those biological marvels by which science 

 has recently revealed the fact that the 

 blood is the most hereditary thing about 

 us, for its hereditary elements override 

 everything in the make-up of the phys- 

 ical animal .body, whether it be the shape 

 of the skeleton, 'of the lungs, of the ali- 

 mentary canal, or of the skin. It even 

 overrides ancestral habits as to the great 

 Food Question Darwin's chief creator, 

 which works by the strife in Nature about 

 how to eat or keep from being eaten. This 

 discovery of the hereditariness of the blood 

 came about in this way. 



Some of the most recondite investiga- 

 49 



