ON THE MECHANICAL PROPERTIES OF STEEL. 



183 



TKANSVEESE STRAIN. 



Exp. XVIII. — Bar of Rtcel from Messrs. JSTaylor & Tickers, Sheffield. 

 Dimensiou of bar 1-026 inch square. Length between supports 

 4 feet inches. Marli on bar, " Vickers' Cast Steel, Special." 



Eesults of Exp. .XVIII. 



Here the weight (iv) at the limit of elasticity is 1410 lbs., and the cor- 

 responding deflection (^) is 1^693. 



By formula (6). — The mean value of the deflection for unity of pressiu'e 

 and section (0^)= -0013386. 



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

 = 29,407,000. 



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

 pressure =29,385,000. 



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

 =99-463. 



By formula (9). — Work of deflection (iC) for unity of section =94-485. 



By formula (12). — Value of C, the unit of working strength =7-856 tons. 



