124 THE SCHOOL BOOK OF FORESTRY 



and practicing care to secure reproduction after 

 logging on our remaining virgin forest land, we 

 can produce annually at least 27,750,000,000 cubic 

 feet of wood, including 70,000,000,000 board feet 

 of sawtimber. Such a production would meet in- 

 definitely the needs of our growing population, 

 and still leave an amount of timber available 

 for export. 



Our hardwoods need protection as well as our 

 softwoods. Ten per cent, of our yearly cut of 

 valuable white oak is shipped overseas. In addi- 

 tion we annually waste much of our best oak in 

 the preparation of split staves for export. At 

 the present rate of cutting, the supply, it is said, 

 will not last more than twenty-five years. We 

 ship abroad about seven per cent, of our poplar 

 lumber. Our supplies of this material will be 

 exhausted in about twenty years if the present 

 rate of cutting continues. We sell to foreign 

 countries at least one-half of our cut of black 

 walnut which will be exhausted in ten to twelve 

 years unless present methods are reformed. Our 

 supplies of hickory, ash and basswood will be 

 used up in twenty to thirty years. We need all 

 this hardwood lumber for future domestic pur- 



