TRACT 31.
OP GUNNERY.
315
Table of Charges for the greatest Velocities.
Length ofthe borein cali-bers.b
Length ofthe pow-der in ca-libers,a
Quotientof b - 7 - a }
b
a
Wt. ofpowder in100 partsjf the wt.of theball.
Greatest ve-locity of ballby each guu.
2
0-63
3-171
12
810
4
1-20
3-333
23
1122
6
1-72
3-488
33
1348
8
2-20
3-636
42
1529
10
2-64
3-788
50
1681
12
3-05
3-934
58
1813
14
3-43
4-082
65
1929
16
3-78
4-233
71
2033
18
4-11
4*380
78
2127
20
4-42
4-525
84
2213
22
4-71
4-671
90
2292
24
4-99
4-810
95
2366
26
5-25
4-952
100
2434
28
5-50
5-091
105
2498
30
5-73
5-235
109
2558
32
5-96
5-369
113
2614
34
6-17
5-510
117
2668
36
6’37
5-651
121
2719
38
6 "5 6
5-793 .
125
2767
40
6-75
5-926
128
2813
42
6-93
6-061
132
2857
44
7-10
6-197
135
2899
46
7-27
6-328
13S
2939
48
7-43
6-460
141
2978
50
7-58
6-596
143
3015
52
7-72
6-736
146
3051
54}
7-86
6-S70
149
3085
56
8-00
7-000
152
3118
5S
8-13
7-134
155
3150
60
8-26
7-264
157
3181
190. In this table, the first column contains the differentlengths of the guns or mortars, expressed in the number ofcalibers, or how many times the diameter is contained in thelength, differing by 2 diameters each time, and extendedfrom the shortest to the very longest piece, so as to include