MAN AND NATURE 5 



which attach themselves to his domestication whether he will 

 or no. Intentionally and unintentionally, directly and in- 

 directly, man transforms and supplants both animal and 

 vegetable life. Some animals he deliberately destroys, some 

 he deliberately introduces, and the characters of some he 

 deliberately transforms by careful selection and judicious 

 interbreeding. Other animals find his presence uncongenial 

 and gradually dwindle in numbers or disappear, while others 

 are encouraged by his activities to increase in numbers, some- 

 times even to his own confounding. 



