394 



FORESTRY INVESTIGATIONS U. S. DEPARTMENT OF AGRICULTURE. 



[116. 

 Mark, j 1. 



White pine. 



Length, 60.0 inches. 

 Height, 3.74 inches. 

 Breadth, 3.75 inches. 



SAMPLE RECORDS OF TESTS. 



CROSS BREAKING TEST. 



Strength of extreme fiber, 

 3 W I 

 where /= 2 ft p=5,660 pounds per square inch. 



Modulus of elasticity = 1,320,000 pounds per square inch. 

 Total resilience =3,460 inch-pounds. El. Res., 550. 



Resilience, per cubic inch =4.11 inch-pounds. El. Res., 0.65. 



[Number annual rings per inch =19.] 



Deflection, -in, inches. 



