193 



REPORT 18G7. 



TEANSTEESE STEAnf, 



Exp. XXYII.— Bar of Steel from Mr. S. Osborii, Clyde Works, Sheffield. 

 Dimension of bar 1-006 inch square in centre. Length between 

 supports 4 feet 6 inches. Mark on bar, " 8. Cast Steel for Boiler 



Plates, (^ 



Results of Ea^p. XXVII. 



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

 responding deflection (l) is 1-320. 



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

 and section (DJ = •0013007. 



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

 = 30,335,000. 



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

 pressure = 29,585,000. 



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

 = 50-000. 



By formula (9). — Work of deflection (m) for unity of section = 49^406. 



By formula (12).— Value of C, the unit of working strength = 5^671 tons. 



