194 



REPORT 1867. 



TEANSVEESE STEAIN. 



Exp. XXIX. — Bar of Steel from Messrs. Bessemer & Co., Sheffield. Dimen- 

 sion of bar 1 X 1'02 inch. Length between supports 4 feet 6 inches. 

 Mark on bar, "BS 2." 



Hesiilts of Exp. XXIX. 



Here the weight (w) at the limit of elasticity is 910 lbs., and the cor- 

 responding deflection (d) is I'llO. 



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

 and section (D^) = -0012946. 



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

 = 30,478,000. 



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

 pressui-e = 28,379,000. 



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

 = 42^087. 



By formula (9). — Work of deflection («) for unity of section = 41^261. 



By formula (12). — Value of C, the unit of working strength = 5^317 tons. 



