LUTHER BURBANK 



with wolves, and foxes, and jackals of every 

 species than with any member whatever of the 

 cat family. Similarly, all cats — tigers, lions, 

 leopards, along with the domestic tabby — give 

 proof, in the chemical constitution of their blood, 

 of a common origin. And, bringing the com- 

 parison still nearer home, the blood of man is 

 more like that of the chimpanzee, the gorilla, and 

 the orang, than it is like that of any other 

 creatures; and the monkey tribes of the Old 

 World are more manlike in the constitution of 

 their blood than are the monkeys of the New 

 World. 



Dr. Nuttall's experiments comprised sixteen 

 thousand individual tests, with a total of at 

 least 586 species of mammals, birds, reptiles, 

 batrachians, fishes, and crustaceans, coming from 

 all parts of the globe. The biological implications 

 of his experiments have been commented upon 

 as follows: 



"Doubtless some hundreds of thousands of 

 years have elapsed since the direct ancestors of 

 men branched from a common stem with the 

 direct ancestors of the gorilla. There has been 

 no blending of blood in the intervening centuries. 

 Cats have been cats and dogs dogs from geological 

 epochs so remote that we hesitate to guess their 

 span in terms of years. So the intimate chemical 



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