ON THE MECHANICAL PROPERTIES OF STEEL. 



209 



TKANSTERSE STEAIN. 



Exp. XLIV.— Bar of Steel from Messrs. Turton & Sons, Sheffield. Dimen- 

 sion of bar -98 inch square. Length between supports 4 feet 

 6 inches. Mark on bar, " I." 



Results of Exp. XLIV. 



Here the weight {w) at the limit of elasticity is 91 lbs., and the corre- 

 sponding deflection (g) is 1-390 



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

 and section (DJ = -001368. 



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

 = 31,198,000. 



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

 pressure = 27,646,000. 



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

 = 52-704. 



By formula (9).— Work of deflection (m) for unity of section = 54-877. 

 By formula (12).— Value of C, the unit of working strength = 5-788 tons. 



1SC7. 



