ABSTRACTS OF TECHNICAL ARTICLES 485 



Chemical Studies of Wood Preservation — The Wood-Block Method of 

 Toxicity Assay.^ Robert E. Waterman, John Leutritz and Caleb 

 M. Hill. Actual decay resistance of treated wood is used as the 

 basis for a simple laboratory technic in the assay of materials advo- 

 cated for the protection of wood. In its present stage of development 

 the test is a valuable tool in wood preservation studies. 



^ Indus. &f Engg. Client., Anal. Ed., June 15, 1938. 



