122
NEW EXPERIMENTS
TRACT 34.
the eprouvette gave 35, 35|, 35|, the medium 35-1, eacli2 oz ; 4 oz gave 84-J. At the 25th shot a large iron bandwas broken and fell off from the lower part of the pendulum,weighing 52lb, which was deducted in the following valuesof p and g. In the last column the velocities are reduced tothe state of the barometer 30, the ball 3ib, and the eprou-vette 36.
163. November 19, 1789. The same continued.Barometer 29-50 ; Thermometer 46.
Dist
gun
Pow-
der
Vili-
pend
Point
struck
Plugs |wt
VaU
P
es of 1
s
Velocityof ball
Veloc
reduced
feet
oz
c
inches
oz
lb
inches
feet
feet
1
330
12
131
94-7
9
1876
80-0
1
2
*
125
91-4
9
79
0
>1119
1105
n
O
*
120
86-0
10
82
0
J
4
430
84d1 87-9
1 3
84
0
grazed
After discharging many more halls from this last distance,without striking the pendulum, but always grazing or strik-ing the screen of timber, the further attempts were declined.The balls used to-day weighed only 2lb 14oz. The powderby the eprouvette 35, 3 5-1, 35|, the medium 35 - 4.
The same 3-pounder gun wasfired, with 4 oz of powder, at 30feet from the pendulum, with theball laid, in the bore, at differentdistances from the muzzle, thepowder being at the bottom, tofind the loss of velocity. Theweight of each ball 2lb 15oz, andthe diameter 2 78 inches. The an-nexed tablet shows the chief cir-cumstances-, the velocities will benearly in the ratio of the numbersin the 4th column divided by those
N°
Ball
from
muzzle
Point
struck
Vili-
pend
Plugs
wt
inches
inches
c
02
1
64-t
90
76
10
2
59*
90
69
7
3
90
67
6
4
47i
90
62
• 5
5
88-6
59
3
6
3 5*
90
55
3
7
29*
88-5
46
8
23*
90
43
9
n*
90
40
10
n*
90
34
1 1
5*
81
18
12
0
76
13