306 



PROCEEDINGS OF THE AMERICAN ACADEMY 



TABLE 11. 

 Series No. 2. Kiln-dried Spruce. 



The letter E is used to denote the modulus of elasticity in these 

 tables, and R the modulus of rupture. 



The quantity denoted by A is one eighteenth of the modulus of 

 rupture. 



It will be noted that the pieces in Series No. 1 were not kiln dried, 

 but were taken from a plank selected from ordinary timber. 



TABLE III. 



Series No. 3. Kiln-dried Spruce. 



