142 



Canadian Forestry Journal, N ovember-Decernber, 1912. 



\( iiuriiS;! A iit( ricdii Foirstrij. 



Experimental Pulp and Paper Mill, U.S. Forest Products Laboratory. 



The laboratoiy l)uildiny; itself is a 

 substantial two-story brick building, 

 180 feet by 80 feet in size. The state 

 of Wisconsin erected the building and 

 supplies water, light, heat and power. 

 The United States federal govern- 

 ment, through the Fore.^t Service, 

 provides the equipment, the stail, and 

 all other maintenance. Ihe railways 

 furnish free carriage for the supplies 

 of the laboratory, and lumbermen and 

 other associations and companies are 

 uiviug material of great vahie for cx- 

 ])rri mental purposes. 



Tlie work of the laboratory, ex- 

 rlusive of the section of Mainten- 

 ance, is divided into eight sections, 

 namely. (1^ Timber Physics, (2) 

 Timber Tests, (3) Wood Preserva- 

 tion. (4) Wood Distillation, (;!) 

 Wood Pulp, (6) Chemistry. (7) En- 

 gineering, and (8) Pathology. (The 

 last-named is conducted in connec- 

 tion with the Bureau of Plant Pa- 

 thology, at Washington.") 



The section of Timber Physics has 

 as its work the study of the struc- 

 tural and physical properties of 

 wood and the ascertainment of how 

 these properties are affected by dif- 

 ferent methods of drying and hand- 

 ling. The (M|uipment of the section 

 includes microscopes, microtomes 

 and other apparatus required for 

 microscopical work, apparatus for 

 taking microphotographs, a cylinder 

 designed for the study of the differ- 

 ent methods of drying wood and an 

 experimental dry-kiln. balances, 

 ovens, calorimeters and other mis- 

 cellaneous equipment. 



In the section of timber tests 

 studies are made of the strength. 

 stiffness, hardness and other me- 

 chanical ])roperties of commercial 

 wood. Tests are made on Avoods 

 that have been treated with preser- 

 vatives and other substances, to de- 

 termine the effect of the i)reserva- 

 \\\v treatment upon the mechanical 



