ON THE MECHANICAi PROPERTIES O? STEEL. 



239 



Exp. XXXVI. — Bar of Steel from Messrs. Turton & Sons, Sheffield. 

 Elongations taken on 8 inches length. Mark on bar, "A." Diameter 

 of specimen -725 inch. Area -4128 square inch. Reduced diameter 

 after fracture -709 inch. Area -3948 square inch. 



Results. — ^Here the breaking strain (P^) per square inch of section is 

 100,155 lbs., or 44^71 tons ; and the corresponding elongation (Z^) per unit 

 of length is -0312. By formula (13). — The work (m) expended in producing 

 rupture = 1562. 



Exp. XXXYII.— Bar of Steel from Messrs. Turton & Sons, Sheffield. 

 Elongations taken on 8 inches length. Mark on bar, " B." Diameter 

 of specimen ^745 inch. Area ^4359 square inch. Eeduced diameter 

 after fracture -74 inch. Area -43 square inch. 



Results. — Here the breaking strain (P^) per square inch of section is 

 87,552 lbs., or 39-08 tons; and the corresponding elongation {\) per iinit 

 of length is -0106. By formula (13). — The -work (w) expended in jiroducing 

 rupture = 464. 



