248 COLLEGE BOTANY 



soil bacteriology and plant pathology and involve a knowledge 

 of physiology, ecology and geography. 



Forestry is very generally recognized as an independent sub- 

 ject, but it has to do with plants and must be considered a 

 botanical subject. It has tO' do with the preservation of our 



Fig. 113. — Modern forestry method? provide for perpetual crops of lumber and other 

 forest products. (U. S. D. A.) 



natural forests, the planting of new forests, the control and 

 protection of forest areas and the utilization of forest products 

 in the industries. It is a very old subject in Europe, where 

 the people recognized centuries ago the necessity of a conserva- 

 tion of their natural resources. It is a comparatively new sub- 

 ject in America, hut is now well established and recognized 

 (Figs. 113 and 114). The United States Government has 151 



