243 



REPORT 1867. 



Elonga- 



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



tions taken on 8 inches length. Mark on bar, " G." Diameter of 

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

 after fracture -729 inch. Area -4173 square inch. 



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

 106,237 lbs., or 47-42 tons; and the corresponding elongation (l^) per unit 

 of length is •0243. By formula (13).— The work (m) expended in producing 

 rupture = 1290. 



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

 tions taken on 8 inches length. Mark on bar, "H." Diameter of speci- 

 men ^746 inch. Area ^4370 square inch. Reduced diameter after 

 fracture ^741 inch. Area ^43 square inch. 



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

 87,471 lbs., or 39-04 tons; and the corresponding elongation (ZJ per unit of 

 length is •0131. By formula (13).— The work («) expended in producing 

 rupture = 572. 



