ON THE MECHANICAL PROPERTIES OF STEEL. 



335 



Exp. XXVIII. — Bar of Steel from Messrs. Bessemer & Co., Sheffield. Elon- 

 gations taken on 8 inches length. Mark on bar, "B SI." Diameter of 



specimen -728 inch. Area -4162 square inch, 

 after fracture '719 inch. Area -406 square inch. 



Reduced diameter 



IS 



Besults. — Here the breaking strain (Pj) per square inch of section ._ 

 103,085 lbs., or 46-02 tons ; and the corresponding elongation (ZJ per unit of 

 length is -0187. By formula (13). — ^The work (u) expended in producing- 

 rupture = 963. 



Exp. XXIX. — Bar of Steel from Messrs. Bessemer & Co., Sheffield. Elon- 

 gations taken on 8 inches length. Mark on bar, " BS2." Diameter of 

 specimen -743 inch. Area -4335 square inch. Eeduced diameter 

 after fractiu-e -531 inch. Area -2214 square inch. 



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

 88,175 lbs., or 39-36 tons ; and the corresponding elongation (ZJ per imit of 

 length is -1093. By formula (13). — The work (to) expended in producing 

 rupture = 4818. 



