ON THE MECHANICAL PROPERTIES OF STEEL. 



215 



TKANSVEESE STRAIN. 



Exp. L. — Bar of Steel from the Barrow Hematite Co., Furness. Dimension 

 of bar 1-02 inch square. Length between supports 4 feet 6 inches. 

 Mark on bar, "HI." 



Results of Exp. L. 



Here the weight (w) at the limit of elasticity is 1210 lbs., and the corre- 

 sponding deflection (e) is 1-546. 



By formula (6).— The mean value of the deflection for unity of pressure 

 and section (DJ = -001308. 



By formula (7).— The mean value of the modulus of elasticity (E) 

 = 30,096,000. 



By formula (2).— The modulus of elasticity (E) corresponding to 112 lbs. 

 pressure = 33,830,000. 



By formula (8).— Work of deflection (U) up to the limit of elasticity 

 = 77-944. ^ 



By formula (9).— Work of deflection {u) for unity of section = 77-917. 

 By formula (12).— Value of C, the unit of working strength = 6-860 tons. 



