FOREST TREES AND FOREST SCENERY 
trees and their rates of growth under 
varying conditions of soil, heat, light, 
and moisture. They also studied the 
numerous dangers to which the forest 
is exposed, and invented means and 
established laws for its protection. In 
short, they effected an ingenious ad- 
justment between the needs of the 
forest and the requirements of man, 
and in course of time laid the founda- 
tions for a new system that was des- 
tined to be of great importance to the 
economic interests of nations. 
Many sciences were involved in the 
solution of these questions. With 
the progress in means and methods the 
aims and objects of the new profes- 
sion gradually grew to be more and 
more clearly defined, and knowledge 
and experience ultimately evolved the 
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