ON THE MECHANICAL PROPERTIES OF STEEL. 



343 



Exp. XLIV.— Bar of Steel from Messrs. Turton & Sons, Sheffield. Elonga- 

 tions taken on 8 inches length. Mark on bar, "I." Diameter of epe- 

 cimen -733 inch. Area -4219 square inch. Reduced diameter after 

 fractui'e '725 inch. Area •4128 square inch. 



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

 97,994 lbs., or 43^74 tons ; and the corresponding elongation (Z,) per unit of 

 length is ^0193. By formula (13). — The work (m) expended in producing 

 rupture = 945. 



Exp. XLV.— Bar of Steel from Messrs. Turton & Sons, Sheffield. Elonga- 

 tions taken on 8 inches length. Mark on bar,"ir." Diameter of spe- 

 cimen -744 inch. Area -4347 square inch. Reduced diameter after 

 fracture ^74 inch. Area ^43 square inch. 



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

 / 3,266 lbs., or 32^70 tons; and the corresponding elongation (1^) per unit of 

 length is ^0087. By formiUa (13).— The work (m) expended in producing 

 rupture = 318. 



s2 



