TRACT 34.
IN GUNNERY.
3
v = ~ x gc by the pendulum, andv — ^ x by the recoil of the gun.
Or v — 12-742 x -y or ~ x by the gun n° 2, when wesubstitute the values of g, g, i, n, specified in Art. 36.And further, when b = 1-047, it is v — 12|c.
The apparatus having been prepared, we employed thethree days, July 21, July 26, and August 3, in hanging itup, and in weighing, measuring, and adjusting all the parts,and trying them by firing a few rounds with powder only.The 4 rounds fired on the first of those days, of 4 ounceseach, with the gun n° 1, weighing 917 lb, gave 56 at thefirst round, and at each of the other three 57 divisions onthe measuring arc, for the recoil of the gun.
69. Wednesday, August 4, 1784.Frequent showers of rain.
N°
Pow-
der
Weight
of
gun
Vibration o 1
Point
struck
| Plugs
Values of
Veloc.
ball
gun
pend
p
g
11
oz
lb
inches
in
lb
inches
feet
1
2
478
55
2
2
478
55
3
2
478
57
4
2
478
57
5
4
478
122
6
8
478
252
7
6
478
426
166
88-9
9
631-5
76-79
40-23
1313
8
6
478
387
151
89-3
5
632-8
76-81
40-23 1192
9
6
478
426
164
88-9
8
634-0
76-83
40-23 1303
10
6
650
279
158
89-2
7
635-3
76-85
40-23 1254
11
6
650
290
160
88-0
8
636-6
76‘87
40-23 1291
12
6
917
193
157
8T3
9
637-9
76-90
40-22 1280
13
6
917
199
162
86-9
9
639-1
76-92
40-22,1329
14
6
917
85
0
I
i
15
6
917
104
20
82-3
1
640-1
76-94
40-22
1
Omitting
n° 8,
the mean is 1295