TRACT 34.
IN GUNNERY.
367
The Pendulum was as weighed and measured yesterday,having hung unused.
The tape drawn out in the last three rounds, both of thegun 'and pendulum, was rather doubtful, owing to the windblowing and entangling it.
2 oz
4 oz
S oz
16 oz
Mean length of charge - 1-8
3-4
5-6
10-8
Mean recoil with ball -
,
29-27
43-70
Ditto without - - 2-81
6-35
14-40
28-72
Difference or c — - -
14-87
14-98
Hence velocity by recoil
,
1643
1656
Mean ditto bv pendulum
,
1936
2161
Difference, very great -
293
505
Or the part - - - -
•
I
X
I
4
, 55. Wednesday, July 30, 1783 ; from 10 till 12.
A fine day, moderately warm.
Barometer 30’06; Thermometer 69° at 12 o’clock.
N°
Paw-
der
Ball’s
Vibration of
Point
struck
V)
in
5
Values of
Veloc.
ball
wt
diant
gun
pend
V
e
71
oz
oz
dr
inches
inches
inches
inches
inc
lb
inches
feet
1
2
27
\
2
2
2-6
3
4
6-2
4
4
6-0
5
4
16
13
1-96
17-8
17-8
88-7
8
709-8
78-04
40-16
1376
6
4
16
13
1-96
17-8
17-4 86-7
9
711-3
78-07
40-16
1380
7
4
16
13
1-96
17-75
17-3 87-2
10
712-9
78*10
40-16
1368
8
2
16
13
1-96
11-0
12-2 l 87-8
7
714-9
78-12
40-15
960
9
2
16
12
1-96
11-25
12-4 86-8
7
715-9
78-15
40'15
993
10
2
16
12
1-96
109
11'9 87-3
5
717-5
78-18
40-15
951
The Gun was again n° 4, and every circumstance aboutit as before. 1