359
NEW EXPERIMENTS
TRACT 34.
N°
Pow-
der
Ball’s
Vibration of
Point
struck
bp
E
Values of
Veloc.
ball
wt
diam
gun
pend
p
g
11
oz
oz dr
inches
inches
inches
inches
in
lb
inches
feet
1
2
2-3
2
2
2-4
3
8
12-3
4
8
13-8
5
8
11-9
6
8
13-0
7
8
13-2
8
8
16 13
1-96
26-3
20 '5
88-6
10
657-0
77'26
40-20
1450
9
8
16 13
1-96
27-2
21-9
89-7
9
658-5
77-28
40-20
1534
10
8
16 13
1-96
25-9
20-3
89-9
9
660-1
77-30
40-20
1423
11
8
16 13
1-96
26-8
20-5
88-6
8
661-6
77-33
40-20
1462
12
8
16 13
1-96
26-3
20-4
88-5
8
663-2
77-35
40-20
1460
13
8
16 13
1-96
1 26-8
20-9
88-6
8
664-7
77-37
40-20
1497
mean
1471
The mean length of the charge of 8 oz was 5'9.
The pendulum, having been so well secured, sufferedbut little by this day’s firing, only bulging or swelling out alittle at the back part. All the balls were left in it, and allthe holes were successively plugged up with oaken pins ofnear 2 inches diameter, which weighed 11 oz to every 10inches in length.—The arcs described, both by the gun andpendulum, are pretty regular. And the whole forms a goodset of experiments.
The mean recoil of the gun with ball 26-55
without ball 12-84difference c = 13-71
Thenw = 27S x 12718x ^ = S x 12718 x
13-71
1-051 x 110-2
1501, the velocity of the ball as deduced from the recoil ofthe gun ; which exceeds that deduced from the pendulumby 30, or nearly -^th part of this latter.