226 



REPORT 1867. 



Exp. X. — Bai- of Steel from Messrs. CammeU & Co., Sheffield. Elonga- 

 tions taken on 8-5 inches length. Mark on bar, " 1." Diameter of 

 specimen -608 inch. Area -29 square inch. Eeduced diameter 

 after fracture -606 inch. Area -2884 square inch. 



Besults. — Here the breaking straia (PJ per square inch of section is 

 110,055 lbs., or 49-13 tons; and the corresponding elongation (?j) per unit of 

 length is •0177. By formiila (13). — The work (u) expended in producing 

 rupture =974. 



Exp, XI.— Bar of Steel from Messrs. Cammell & Co., Sheffield. Elongations 

 taken on 8 inches length. Mark on bar, " 2." Diameter of specimen 

 •61 inch. Area ^2922 square inch. Eeduced diameter after frac- 

 ture -605 inch. Area ^2874 square inch. 



IS 



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

 109,072 lbs., or 48-69 tons; and the corresponding elongation (\) per unit of 

 length is -0206. By formiila (13). — The work («) expended in producing 

 rupture =1123. 



