233 



EEPORT 1867. 



Exp. XXII. — Bar of Steel from Messrs. Osborn & Co., Sheffield. Elongations 

 taken on 8 inches length. Mark on bar, " 3." Diameter of specimen 



■738 inch. Area "4277 square inch. 

 •728 inch. Area '4162 square inch. 



Eeduced diameter after fractiu-e 



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

 115,849 lbs., or 51^71 tons ; and the corresponding elongation (Z,) per unit of 

 length is -0298. By formula (13). — The work (?t) expended in producing 

 rupture = 1726. 



Exr. XXIII.— Bar of Steel from Messrs. Osborn & Co., Sheffield. Elonga- 

 tions taken on 8 inches length. Mark on bar, " 4." Diameter of 

 specimen ^73 inch. Area ^4185 square inch. Eeduced diameter after 

 fracture ^725 inch. Area ^4128 square inch. 



i?c.«?!(7('s.— Here the breaking strain (P^) per square inch of section is 

 98,790 lbs., or 44-10 tons; and the corresponding elongation (7,) per unit of 

 length is ^0181. By formula (13). — The work (m) expended in producing 

 rupture = 894. 



