. . 



wood preservation and other wood-using industries. The investigations cover 

 studies of the fundamental physical properties, such as thermal properties, 

 penetrability to liquids and gases, hydroscopicity and density; they include 

 also experiments in air-seasoning, kiln-drying, and transformation of wood. 



Relation of structure to properties. The microscopic structure of wood is 

 very closely related to its physical and mechanical properties and uses. A de- 

 tailed study of the structure of various commercial species will be made, the 

 results of which will be valuable in indicating the uses to which the species 

 are best adapted and will assist in the determination of other properties and 

 of the behavior of the woods under various treatments. 



WOOD PRESERVATION. 



The study of wood preservation deals with the protection or preservation of 

 wood from decay, fire, insects, and other destructive agencies. Of these, decay 



