354 



REPORT — -1867. 



Exp. XY. — Bar of Steel from Messrs. Cammell & Co., Sheffield. Mark 



on bar, " 6." 



Before experiment. After experiment. 



Height of specimen -997 inch -514 inch. 



Diameter of specimen -72 inch. .... "891 inch. 



Area of specimen -40715 sq. in -63334 sq. in. 



Results. — Here the strain per square inch (P^) causing rupture is 225,568 

 lbs., or 100-7 tons ; and the corresponding compression (1^) per unit of length 

 is •493. By formula (13). — The work (u) expended in producing rupture 

 =55472. 



E?P. XVIfTTT^ar of Steel from Messrs. Naylor, Vickers &, Co. Mark 



on bar, " V. A." 



Before experiment. After experiment. 



Height of specimen ^983 inch -569 inch. 



Diameter of specimen -72 inch. .... •SeS inch. 



Area of specimen ^40715 sq. in -58765 sq. in. 



1 

 2 

 3 



4 

 5 



6 



7 

 8 

 9 



37438 

 44966 

 52166 

 58950 

 66022 

 73134 

 80214 

 88134 

 91840 



16-713 

 20-074 

 23-288 

 26-316 

 29-474 

 32-049 

 35-809 

 39-345 

 41-000 



91951 

 110440 

 128124 

 144786 

 102150 

 179722 

 197023 

 216465 

 225568 



41-049 

 49-303 

 57-198 

 64-637 

 72-391 

 80-233 

 87-952 

 96-036 

 100-700 



-050 

 •075 

 -123 

 •179 

 •248 

 •307 

 •356 

 •395 

 •423 



Results.- — Here the strain per square inch (Pj) causing rupture is 225,568 

 lbs., or 100^7 tons ; and the corresponding compression (Z^) per unit of length 

 is •423. By formula (13). — The work (it) expended in producing ruptiu-e 

 =47596 



