150 THE SCHOOL BOOK OF FORESTRY 



made from sawdust and other mill refuse. One 

 ton of dry Douglas fir or southern yellow pine 

 will yield from twenty to twenty-five gallons of 95 

 per cent, alcohol. It is estimated that more than 

 300,000,000 gallons of alcohol could be made an- 

 nually from wood now wasted at the mills. 

 This supply could be increased by the use of 

 second-growth, inferior trees and other low- 

 grade material. 



