the present crop of trees, "but it is of equal importance that 

 care be taken to "bring about as complete a utilization of the 

 tree as possible and to make the utilized timber serve its 

 purpose as long as possible. To bring about the utilization 

 of whot is now wasted in manufacture or to increase the usable 

 life of timber is considered as much forest conservation as to 

 grow a forest where the original has been cut off. 



Since more than 50 per cent of the growing tree is 

 not utilized according to American methods of lumbering it ap- 

 pears that there is a considerable need of study along the line 

 of more economical utilization. Although existing conditions 

 are so different as to make comparison difficult yet the fact 

 that in Germany practically 80 per cent of the tree is used 

 gives some indication of what may be accomplished where the 

 price of lumber and the laok pf a sufficient supply make effi- 

 cient and careful methods indispensable. 



The Branch of Products has made a special effort to 

 make possible the utilization of the waste incident to manu- 

 facture after the log has reached the mill. For some tir.:b ex- 

 periments have been carried on studying the possibilities of 

 utilizing slabs and sawdust. In regions where there is a suf- 

 ficient demand a considerable income is derived from the sec- 

 ondary manufacture by private parties, of slabs and edgings 

 into box shocks, barrel staves, and lath. As yet private and 

 federal efforts to utilize sawdust have not been as successful 



