tion, may possibly extend the life of the remaining 

 industries to as much as 30 years. Furthermore, 

 othei less tangible factors — e. g., the use of species 

 or grades not at present used — will in general oper- 

 ate to extend the life of the industries. On the 

 other hand, any increase in the production of 



existing individual plants over the 1934 base or the 

 introduction of new ones, as a result of improved 

 economic conditions, will tend to shorten the life of 

 the lumber, veneer, cooperage stock, and other 

 industries requiring high-grade timber. 



37 



