268 REPORT— 1867. 



Exp. XLIII.— Bar of Steel from Messrs. Turton & Sons, Sheffield. Mark on 



bar, " H." 



Before experiment. After experiment. 



Height of specimen -993 inch. .... -731 inch. 



Diameter of specimen '72 inch. .... '776 inch. 



Area of specimen -40715 sq. in -47294 sq. in. 



No. 



of 



Exp. 



1 



2 

 3 

 4 



5 

 6 



7 

 8 

 9 



Weight laid 



on 



specimen. 



lbs. 



37438 

 44966 

 52166 

 58950 

 66022 

 73134 

 80214 

 88134 

 91840 



tons. 



16-713 



20-074 

 23-288 

 26-316 

 29-474 

 32-649 

 35-809 

 39-345 

 41-000 



Weight laid 



on per square inch 



of section. 



lbs. 



91951 

 110440 

 128124 

 144786 

 162156 

 179722 

 197023 

 216465 

 225568 



tons. 

 41-049 

 49-303 

 57-198 

 64-637 

 72-391 

 80-233 

 87-952 

 96-636 

 100-700 



Com- 

 pression, 

 ininchea 



•020 

 •025 

 •043 

 •059 

 •088 

 •137 

 •196 

 •245 

 •273 



Remarks. 



No cracks. 



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

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

 is -273. By formula (13). — The work {u) expended in producing rupture 

 =30718. 



Exp. XLIV.— Bar of Steel from Messrs. Turton & Sons, Sheffield. Mark on 



bar, " 1." 



Before experiment." After experiment. 



Height of specimen '988 inch. .... ^722 inch. 



Diameter of specimen ^72 inch. .... ^781 inch. 



Area of specimen "40715 sq. in "47783 sq. in. 



1 



2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 



37438 

 44966 

 52166 

 589.50 

 66022 

 73134 

 80214 

 88134 

 91840 



16-713 



20-074 

 23-288 

 26-316 

 29-474 

 32-649 

 35-809 

 39-345 

 41-000 



91951 

 110440 

 128124 

 144786 

 162156 

 179722 

 197023 

 216465 

 225568 



41-049 

 49-303 

 57-198 

 64-637 

 72-391 

 80-2.33 

 87-952 

 96-636 

 100-700 



•020 

 •025 

 -043 

 -059 

 •108 

 •157 

 •206 

 •255 

 -273 



Yery slightly cracked. 



Results. — Here the strain per square inch (PJ causing rupture is 

 lbs., or 100-7 tous ; and the corresponding compression (ZJ per unit of 

 •273. By formula (13). — The work (u) expended in producing 

 =30718. 



225,568 



length is 



rupture 



