320 THE PRINCIPLES OF HANDLING WOODLANDS 



and hail-storms, by inundation by water, by exposure to 

 acid fumes from smelters, etc. For a full discussion of 

 these various injuries and the methods of protection from 

 them, the reader is referred to special works on forest 

 protection, of which Dr. Schlich's "Manual of Forestry," 

 Volume IV, is recommended. 



