ON THE MECHANICAL PROPERTIES Ol' STEEL. 



229 



Exp. XVI.— Bar of Steel from Messrs. ISTaylor, Vickers & Co., Sheffield. 

 Elongations taken on 8 inches length. Mark on bar, " Axle Steel." 

 Diameter of specimen "606 inch. Ai'ea •28S-i square inch. Eeduced 

 diameter after fracture -44 inch. Area '152 square inch. 



Besiilis. — Here the breaking strain (PJ per square inch of section is 

 88,665 lbs., or 39^58 tons ; and the corresponding elongation (1^) per ituit of 

 length is -0625. By formula (13). — The work (ii) expended in producing 

 rupture =? 2270. 



Exp. 



XYII.— Bar of Steel from Messrs. Kaylor, Yickers & Co., Sheffield. 

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

 of specimen ^744 inch. Area ^4347 square inch. Eeduced diameter 



after fracture •oS inch 



Ai'ea ^2206 square inch. 



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

 91,520 lbs., or 40-85 tons ; and the corresponding elongation (?,) per unit of 

 length is ^0475. By formula (13). — The work {u) expended in producing 

 rupture = 2173. 



