52 THE SCHOOL BOOK OF FORESTRY 



woodlands, sawmills and logging camps. The 

 automobile industry now uses considerable hick- 

 ory in the wheels and spokes of motor cars. 



Most of the stock used by the vehicle industry 

 is purchased green. Neither the lumber nor ve- 

 hicle industry is equipped with enough kilns for 

 curing this green material. The losses in work- 

 ing and manufacturing are heavy, running as 

 high as 40 per cent. Many substitutes for ash, 

 oak and hickory have been tried but they have 

 failed to prove satisfactory. On account of the 

 shortage and the high prices of hickory, vehicle 

 factories are using steel in place of hickory wher- 

 ever possible. Steel is more expensive but it can 

 always be secured in quantity when needed. 

 Furthermore, it is durable and very strong. 



Thus we see that our resources of useful soft 

 woods and hard woods have both been so dimin- 

 ished that prompt reforestation of these species 

 is an urgent necessity. 



