3S2
NEW EXPERIMENTS
TRACT 34'.
66. Monday, September 29, 1783; from 10 a. m. till H p. m.The weather fine, clear, and warm.
Barometer 30-28 ; Thermometer 64° at 10 A. M.
N°
Powder
Ball’s wt.
Vibration of
Point
struck
cn
bp
£
Values of
Veloe.of theball
wt
lit
gun
pend
p
8
n
oz
inches
oz
dr
inches
inches
inches
in
lb
inches
feet
1
2
2-8
2
2
2-75
3
6
4'5
16
Hi
22-6
20-5
88-9
7
654"0
77-20
40-21
1448
4
8
5-6
16
1H
26'9
22*1
89-1
10
655-4
77-22
40-21
1561
5
10
6\9
16
14
30'2
23-4
91-3
8
656-9
77-25
40-20
1618
6
12
8-3
16
14
33-3
23'9
90-6
9
658-3
77-27
40-20
1669
7
14
9-5
16
14
37 -4
24'7
88-9
10
659-8
77-30
40-20
1763
8
16
10'7
16
Hi
35-9
2 I'd
87-3
9
661-3
7T32
40-20
1566
9
16
1 l'C
16
14
40'1
23'5
87-8
8
662-8
77-35
40-20
1707
10
18
12-1
16
14
327
18-3
87T
6
664-2
77-37
40-20
1343
11
18
12-2
16
14
39-5
21-9
87-7
12
665-5
77-40
40-20
1598
12
20
13-0
16
u
42-7
23-4
91-8
10
667-1
77-43
40-19
1639
13
14
9-6
16
n
21-6
89-3
9
668-6
77-46
40-19
1561
The Gun n° 2.—At the last round the tape broke, so thatthe recoil could not be measured. N os 8 and 10 are plainly
both irregular, the recoils being greatly deficient: the vi-brations of the pendulum might perhaps be defective by theballs being resisted sideways by the wood, or by changingtheir direction within the block ; but there is no cause whichI can suspect for the defective recoils of the gun, as all thecircumstances were alike in every case, and the heightsof the charges show that there w r as no mistake in the quan-tity of powder.—At the last firing the vent had a smallchannel blown in it, though the gun was no where very hot.
The Penduuum had received a new core of sound dryelm, and weighed this morning, when it -was hung up,654 lb.
The diameter of the balls T96 inches.
The plugs w-eighed 6- oz to 8 inches.
The value off, or mean point struck, 89'1.
The first penetration was 12 inches measured behind theball, and consequently the fore part penetrated 14 inches.