ON THE MKCHANICAL PROi'ERTIES Of STEEL. 



197 



TRANSVEESE STRAIN. 



Exr. XXXII. — Bar of Steel from Messrs. Sanderson Brothers, Sheffield. 

 Dimension of bar 1*044 inch square. Length between supports 

 4 feet 6 inches. Mark on bar, " S 2." 



Results of Exp. ^XXLl. 



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

 responding deflection {l) is 1-040. 



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

 and section (D^) = -0013412. 



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

 = 29,351,000. 



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

 pressure=28,074,000. 



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

 =39-433. 



By formula (9). — Work of deflection (?<) for unity of section =37- 022. 



By formula (12). — Value of C, the unit of working strength= 4-808 tons. 



