848 
MINUTES OF PROCEEDINGS OF 
APPENDIX, No, III. 
TABLE SHOWING THE RESULTS OF MECHANICAL TESTS APPLIED TO 
SAMPLES OF LOWMOOR CAST-IRON. 
Mechanical 
test. 
Ordnance. 
lbs. per 
1 
square in. 
So 
« 
Remarks. 
1 
Nature, 
fc* 
Ph 
Tensile, 
Trans¬ 
verse. 
1 
i 
6,903 
6,938 
29,270 
7*251 
29,571 
7-235 
6,958 
29,726 
7'234 
” ” 
6,959 
29,307 
7'232 
Used on board the “Rocket” in 
» ” 
6,344 
29,231 
7,425 
7-170 
the Baltic, 1855. Had lead run 
3) 33 
7,047 
6,438 
7,366 
7.369 
7.370 
1 
29,947 
7,865 
7-223 
into a cavity at bottom of bore. 
33 33 
28,628 
6,910 
7-250 
29,766 
11,448 
7-253 
30,662 
11,478 
7-194 
33 33 
28,703 
11,883 
7-211 
12-pr. bore in 32-pr. block 
26,454 
7,773 
7-217 
Rifled on Mr Whitworth’s prin¬ 
ciple. Burst at practice, at 
Means...... 
29,206 
9,254 
7-225 
Shoeburyness. 
8043 
32-pr. gun. 
11,000 
29,421 
29,000 
Burst in proof. Min. 6207. 
26,218 
11,130 
25,163 
27,084 
Tested to destruction. Min. 6554. 
» 
” 
27,322 
11,133 
27,800 
27,084 
Burst in proof. Min. 6207. 
” 
33 
27,498 
27,414 
7860 
Mr Haddan’s gun, 32-pr. 
8,640 
28,200 
Tested to destruction. Min. 7071. 
30 211 
27,842 
1450 
6'6-in. hooped gun . 
9,258 
29,096 
„ „ Min. 1004. 
31,673 
30,285 
7*0-in. hooped gun. 
9,420 
28,963 
27,104 
„ „ Min. 1119. 
» 
30,508 
7*6-in. hooped gun . 
9,363 
28,246 
„ „ Min. 1119. 
» 
28,515 
29,366 
6483 
70-pr. cylinder hooped ... 
30,813 
30,128 
29,500 
„ „ Min. 6234. 
32-pr. hooped gun . 
26,368 
25,884 
27,000 
„ „ Min, 6234. 
” 
7869 
70-pr. „ 
9,342 
29,608 
27,122 
26,800 
„ „ Min. 6350. 
» 
32-pr. „ 
428 
27,443 
25,615 
26,400 
„ „ Min. 7024. 
7861 
68-pr. unstrengthened gun 
8,544 
21,999 
27,800 
27,800 
„ „ Min. 7450. 
» 
32-pr. „ 
8,541 
30,060 
29,083 
27,900 
„ „ Min. 6885. 
6801 
68-pr. hooped gun 
29,382 
29,683 
29,000 
„ „ Min. 6415. 
28,251 
27,771 
28,501 
27,969 
