214 
MINUTES OF PEOCEEDINGS OF 
13.— Table- II. 
Abstract of all the Hounds fired from Maileds 36-inch Mortar No. 1. 
(No importance attaches to the defections, as there ivere no means of 
directing the mortar. Seep. 218 as to the shells). 
No. 
Date. 
1857-8. 
6 
Charge. 
Shell. 
t. 
Eange. 
Def 
tic 
L. 
lec- 
m. 
E. 
e 
O / 
lbs. 
kilos. 
lbs. 
kilos. 
secs. 
yds. 
metres. 
yds. 
yds. 
o / 
1 
Oct. 19 
48 20 
10 
4-53 
2376 
1075 
? 
370 
338 
— 
— 
2 
it 
it 
20 
9-05 
2362 
1069 
13-0 
900 
823 
5, 
— 
— 
3 
a 
48 30 
30 
13-57 
2596 
1174 
17-0 
1277 
1168 
11 
— 
_ 
4 
a 
a 
40 
18-10 
2352 
1064 
19-0 
1711 
1565 
6 
— 
,— 
5 
a 
n 
60 
22-62 
2986 
1351 
20-0 
1732 
1584 
5 
— 
— 
6 
n 
„ 
60 
27-15 
2604 
1178 
24-0 
2270 
2077 
78 
— 
_ 
7 
a 
70 
31-67 
2548 
1153 
— 
2644 
2418 
94 
— 
— 
8 
Dec. 18 
42 30 
40 
18-10 
2660 
1204 
17-3 
1623 
1484 
— 
15 
52 0 
9 
n 
a 
40 
18-10 
2660 
1204 
17-5 
1681 
1537 
12 
— 
64 52 
10 
„ 
40 
18-10 
2940 
1330 
16-9 
1525 
1394 
— 
13 
65 58 
11 
n 
i, 
40 
18-10 
2940 
1330 
16-1 
1491 
1363 
— 
35 
59 55 
12 
n 
n 
40 
1810 
2940 
1330 
15-0 
1468 
1342 
— 
24 
58 55 
13 
„ 
40 
18-10 
2940 
1330 
16-8 
1439 
1316 
19 
— 
49 52 
14 
July 21 
45 0 
40 
18-10 
2419 
1093 
17-75 
1700 
1554 
— 
60 
65 30 
15 
a 
n 
50 
22-62 
2403 
1087 
21-5 
2120 
1938 
— 
11 
52 0 
16 
July 28 
45 0 
50 
22-62 
2373 
1074 
20-0 
2100 
1920 
— 
68 
58 0 
17 
/; 
i, 
60 
27-15 
2385 
1080 
21-0 
2323 
2124 
— 
115 
65 0 
18 
n 
a 
70 
31-67 
2400 
1086 
24-5 
2758 
2522 
— 
123 
_ 
19 
n 
" 
80 
36-20 
2395 
1084 
23-0 
2759 
2523 
— 
72 
62 0 
14. Rounds 1 and 2, with 10 lbs. and 20 lbs. respectively produced no 
effect on the piece. 
At round 5 it was seen that the rear retaining screw was not strong 
enough to resist the shock it received. It was slightly bent, and some of the 
threads cracked. At round 7, charge 70 lbs., a crack 4 ins. long appeared 
externally in the second hoop of the outside ply of the centre ring, and 
the Committee, as a measure of precaution, and as there was no urgency of 
time, deemed it necessary to have this ring removed and repaired, or 
replaced by a new one, before the practice should proceed. Mr. Mallet 
would have preferred to disregard the accident. The mortar was now 
minutely examined. The crack above referred to was found to run through 
the hoop, a thickness of 2*4 ins., and was about *03 in. wide. There were 
no other defects of any consequence, but numerous small and superficial 
marks or striae, such as forged iron always developes, had been brought 
to light by the gas. One of six 0*875-inch diam. screw pins, by which 
the clip-ring at the muzzle was attached, was broken, and the wedges 
or cotters of the longitudinal bolts were generally bent* some of them as 
much as 0*6 in. 
Mr. Mallet claimed the fracture of an exterior ring as a satisfactory proof 
that the bursting strains were actually transmitted truly through the whole 
thickness of metal in the chase, so that the outside bore equally with the 
interior, and it was found on examination that the lap-weld of this ring was 
