108 



REPORT — 1869. 



TRANSVERSE STEATN-. 



Exp. II. — Bar of Steel from the Barrow Hjematite Steel Company. Dimen- 

 sion^ of bar '995 inch square. Length between supports 4 feet 

 6 inches. Mark on bar, " H 2. Medium." 



Results of Exp. II. 



Here the weight («') at the limit of elasticity is 510 lbs., and the corre- 

 sponding deflection {S) is -682. 



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

 and section (Dj) = -001280. 



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

 = 30,754,000. 



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

 pressure = 34,443,000. 



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

 = 14-242. 



By formula (9). — Work of deflection {li) for unity of section = 14-383. 



By formula (12). — Talue of C, the unit of working strength = 3-108 tons. 



