THE TRAINING OF A FORESTER 



community of trees, but each species of tree 

 has peculiar characteristics and habits also. 

 Just as in New York City, for example, the 

 French, the Germans, the Italians, the Hun- 

 garians, and the Chinese each have quarters 

 of their own, and in those quarters live in 

 accordance with habits which distinguish 

 each race from all the others, so the different 

 species of pines and hemlocks, oaks and 

 maples prefer and are found in certain defi- 

 nite types of locality, and live in accord- 

 ance with definite racial habits which aa^ as 

 general and unfailing as the racial char- 

 acteristics which distinguish, for example, 

 ttie Italians from the Germans, or the 

 Swedes from the Chinese. 



The most important of these characteris- 

 tics of race or species are those which are 

 concerned with the relation of each to light, 

 heat, and moisture. Thus, a river birch will 

 die if it has only as much water as will suflSce 



16 



