342 MAN'S USE AND CONSERVATION OF SOILS 



crept downward into the valleys and streams, now runs 

 off quickly, flooding the rivers and doing damage to regions 

 at a distance. Streams which formerly varied but little 

 in their volume during the entire year now become subject 

 to great extremes of high and low water. This renders 

 them less useful for manufacturing, commerce, and water 



BAD FORESTRY 



The debris was left to feed the forest fires and all the standing 

 timber was ruined. 



supply, to say nothing of the frightful damage done each 

 year by floods. 



Not only is the destruction of our forests a menace to 

 agriculture and to river navigation, but it actually threatens 

 our future lumber supply. The ruthless destruction of 

 vast forests in Europe during the World War has made more 

 imperative than ever the conservation of what forests we 

 have left in America. 



In recent years the demand for lumber and wood pulp 

 and the careless and wasteful way in which the forests 

 have been handled by the lumbermen has greatly reduced 



