value of this work is beyond the comprehension of anyone 

 not familiar with the scope of the wood-using industries of 

 the United States. If no further work had been done than 

 that done by this one department, the entire expenditure of 

 the forest service in the forest products laboratory would 

 have been more than justified. 



The department of wood preservation has also accomplished 

 other results which have affected the utilization of commer- 

 cial woods to a wonderful extent: The preservation of ties, 

 piling, structural timber, wood paving blocks and all woods 

 exposed to weather and water have been taken up with ex- 

 cellent results. It has also done work toward making wood 

 fire resisting, and, on the whole, has accomplished wonders 

 in lengthening the life of woods in commercial use. 



More Material for Pulp. 



The pulp and paper laboratory, one branch of which is 

 located at Wausau where all experiments on mechanical pulp 

 have been conducted, has been so successful that the Ameri- 

 can Pulp and Paper Association has co-operated with the gov- 

 ernment in the work. The results obtained at Wausau have 

 shown that other woods are suitable for making pulp than 

 those at present used, which are tamarack, sprue, fir and 

 aspen. 



Other ^problems investigated are the use of sawdust for 

 making alcohol, the distillation of wood for making char- 

 coal, wood tar, acetone and wood alcohol and promising re- 

 sults have been obtained. 



The republic of Colombia is said to have excellent regulations 

 for its national forests. Lumbermen who take cedar and ma- 

 hogany are required to plant young trees of the same species in 

 the cut-over spaces. 



