FOREST SERVICE. 



Hexhy S. Graves, Forester. 

 AiBERT F. Potter, Associate Forester. 

 Herbert A. Smith, Editor. 



BRAXCH OF PRODUCTS. 



McGartet Clen-e, Director, Forest Products Laboratory, in Charge. 

 Howard F. ^Veiss, Assistant Director. 

 H. S. Betts. Assistant District Forester. 



ADDITIONAL COPIES of this publication 

 -^ may be procured from the Supeeixtexd- 

 EXT OF DoctTMEXTS, Government Printing 

 Office, Washington, D. C, at 10 cents per copy 



