188 



REPORT — 1867. 



TEAirSTDESE STEAUT. 



Exp. XXIII.— Bar of Steel from Mr. S. Osborn, Clyde Works, Sheffield. 

 Dimeusion of bar -994 x 1-006 inch. Length between supports 

 4 feet 6 inches. Mark on bar, " 4. Improved Die Steel, Q ^ ' ." 



Results of Exp. XXIII. 



Here the weight {w) at the limit of elasticity is 1010 lbs., and the cor- 

 responding deflection {h) is 1^344. 



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

 and section (DJ = -0013409. 



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

 = 29,368,000. 



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

 pressure = 29,718,000. 



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

 = 56-433. 



By formula (9). — Work of deflection (?<) for unity of section = 56-435. 



By formula (12). — Yalue of C, the unit of working strength = 6-037 tons. 



