TRACT 34.
IN GUNNERY.
11
The value of i this clay, or the mean distance of thepoints struck* is 89-7.
74. Wednesday , August 11, 1784 ; from 10 till 2.The air was warm, close, and thick.Barometer 30-25 ; Thermometer 65° at 10 A. m.
N°
Pow-
der
Vibration of
Point
struck
1 Plugs
Values of
Veloc.
of
ball
gun
pend
p
S '
n
oz
inches
in.
lb
inches
feet
1
4
d 65
2
10
272
183
89-4
7
686-7
76-87
40-25
1561
3
8
240
176
89-7
6
688-0
76-86
40-24
1499
4
12
297
183
89-5
6
689-3
76-91
40-24
1566
5
10
258
168
88-8
7
690-6
76-93
40-24
1452
6
10
263
168
88-1
6
691-8
76-95
40-24
1466
7
12
293
177
88-2
8
693-1
76-97
40-24
1546
8
14
327
182
89-8
10
694 3
76-99
40-24
1565
9
14
310
175
89-8
9
695-5
77-01
4024
1508
10
8
240
172
88-6
8
696-9
77-03
40-23
1505
11
8
232
164
89-7
8
698-1
77-05
40-23
1421
12
6
151
89-5
6
699-4
77-07
40-23
1319
13
6
200
157
88'6
6
700-7
7T09
40-23
1388
14
12
283
157
85-1
9
702-0
7T11
40-23
1448
15
14
318
169
88-0
7
703-2
77-13
40-23
1510
16
6
202
149
84-0
1 8
704-5
77-15
40-23
1398
The diameter of the balls 1'965, and weight 16 oz 14^ dr.
The Gun was n° 1, weighing, with the usual leads, 917 lb.
The Pendulum as left hanging since yesterday.
The mean value of i, for the last two days, is 88-91.
After the experiments were ended this day, the pendulumwas weighed, and found to be 706 lb. Now the originalweight, when weighed at first on the 26th of July, seeminglywith as much care as now, was 627 lb ; to this add 61ilbweight of balls and plugs lodged in it, with 10 lb of ironadded on the 8th of August, and they make together 698ilb ;from this take 1-6 lb, for the diminution of the leaden facingof the pendulum, by the balls striking and piercing it, and