76 OUTLINES OF FORESTRY. 



grown for him. It is, however, by the abuse and 

 not by the use of nature's lavish gifts that man 

 deranges its economy, and thus brings on himself 

 so much punishment. If he would only be careful 

 to select trees of vigorous growth, and in cutting 

 them down would exercise care that the remaining 

 trees might live; if he would carefully preserve 

 the soil, and hold in check the other enemies of 

 the forest ; if he would wisely set aside large por- 

 tions of the mountain slopes, the natural home of 

 the forest, as areas on which trees should be con- 

 tinually preserved, the earth would yield of her 

 abundance all the wood required for his use. 



Referring to the insect enemies of the forest, 

 Hough, in a report to the United States Commis- 

 sioners of Agriculture,* page 263, in citing a 

 writing of Grandjean, Conservateur des Forets, 



" The timber-tree particularly suffering from this cause was 

 the Abies excelsa (D.C.), or common European spruce-fir, and 

 the species of insects that did the injury were the Bostrychus 

 typographicus and the B. chalcographicus, of which the first 



* Eeprinted, by permission, from the " Report on Forestry," 

 submitted to Congress by the Commissioner of Agriculture, 

 by Franklin B. Hough. Washington : Government Printing- 

 Office, 1882. Pp.318. 



