62 THE BOOK OF FORESTRY 



While tHe increase in lumber values which is bound 

 to occur may cause the use of substitutes to some degree 

 it is safe to say that wood in the future as in the past 

 will be indispensable to our civilization, for it is hard 

 to conceive of any substance, natural or artificial, which 

 is so easily produced, so readily worked into shape and 

 so generally useful as wood. 



