372	CAST IBON AND PIG IKONS
Cast Iron from Watertown Arsenal Foundry—Continued.
Diam- eter.	Tensile strength per square inch.	Fracture.	Specific gravity.
Inches. .505	Pounds. 27,500		7.018
.505	30.350 29,400 29,680 32,800 33,160 30,500 27,600 24,100 29,250 23.900 28.350 25,000 21.900		7.318
. 505			7.208
.564			7.133
.564			7.016
.564			7.353
.505			7.599
.505			7.167
.505			7.122
.505			7.268
.505			7.142
.505			6.986
.505			6.980
.505			7.045
.505	2i;500 23.050 22,650 26.050		7.179
.505			6.989
.505			7.285
.505			7.096
.505	23.450 24.450 22,200 22,600 29,250 30.600 21,000 29,200 29.450 30,950 28.550 27,000 28.550 24,150 21,800 26,100 27,800 26.600		7.123
.505			7.203
.505			7.126
.505			7.122
.505			7.217
.505			7.279
.505			7.045
.505			7.249
.505			7.325
.505			6.776
.505			7.002
.505			6.891
			7.236
.505			7.066
29־1.1			7.231
.505			7.133
.505			7.035
.505			do	1. _T—T—		6.942