TRACT 34 ,
IN GUNNERY, 1791
147
Regular Velocities of the Long Gun, and their Differences.
Dists.
Dills.
31b powder.
21b powder.
I ljlb powder.
1 lb powder*
30
115
200
285
85
85
85
Veloc.
1813
1748
1686
1627
Diffs
65
62
59
Veloe.
1676
1618
1562
1508
Dill's,
58
56
54
Veloc:.
Io06
1454
1404
1356
D.fF.,
52
50
43
V loe.1306125912141171
Di Ifs ■
47
45
43
193. Then, by applying to these numbers the usual the-orem, r = LIL[) where r denotes the resistance to the mid-
9 32j 1
die velocity v, and v’ the velocity lost in the space s , whichhere is 85 feet, with the mean velocity v, and b the weightof the ball, which in this case is Gib 1-ioz, and diameter 3 '55inches; the resistances in lbs will be as in the 2d column oftable 1 here below, to the mean velocities exhibited in thefirst column.
Table I.
Table II. Regular, in lbs and ounces.
Mean
veloc.
Comp.
resist.
Regular
veloc.
In ounces
Diffs.
2 Jiffs
Regular
resist.
Diffs.
2 diffs
feet
1193
1237
1283
1378
1428
1480
1535
1590
1647
1654
1717
1781
lbs
115
125
135
154
160
172
185
199
214
219
239
259
feet
1200
1250
1300
1350
1400
1450
1500
1550
1600
1650
1700
1750
1800
0 z
1840
2030
2229
2436
2650
2870
3094
3321
3550
3780
4010
4239
4465
190
199
207
214
220
224
227
229
230230229226
9
8
7
6
4
3
2
1
0
-1
-3
lbs
115-0126-9139-3152-3165-7179-4193-4207-6221-9236-3250-7265 0279-1
11- 9
12- 4
13- 013-4
13- 7
14- 014-214-314-414-414-314-1
•5
6
4
3
3
2
1
1
0
-1
-2
But as the velocities, in this table 1, are at unequal inter-vals, and the correspondent computed resistances containsome few very small irregularities, the numbers are reduced,in table 2, to equal intervals of velocity, differing by equal
L 2