170 



REPORT 1867. 



TBAXSVERSE STKAIN. 



Exp. v. — Bar of Steel from Messrs. John Browu & Co., Sheffield. Dimen- 

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

 6 inches. Mark on bar, " B 5." 



Results of Exp. Y. 



Here the weight {iv) at the limit of elasticity is 960 lbs., and the corre- 

 sponding deflection (o) is 1-337. 



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

 and section (D^) = -0012673. 



By formvda (7). — The mean value of the modulits of elasticity (E) 

 = 29,248,000. 



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

 pressure = 31,510,000. 



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

 = 53-480. 



By formula (9). — Work of deflection («) for unity of section = 55-685. 



By formula (12). — Value of C, the unit of working strength = 6-134 

 tons. 



