TRACT 34.
IN GUNNERY.
355
47. Friday, July 11, 1783 ; from 9 A. M. till - - -Fine, clear, hot* weather.
PENDULUM.'
Weight - - - - 610
To centre of gravity 76-4To the tape - - - 118
gun, n° 3.
Weight - - - - 917
To centre of gravity 80 - 47To the tane - - - 110
N°
Pow-
der
Ball’s
Chord of tib.l
Point
hi
O
o.
Values of 1
Veloc.•f theball
-Wt
diam
gun
P*nd
struck
p
g
n
oz
oz dr
inches
inches
inches
inches
1
2
2-5
2
2
2-5
3
16
28-4
4
16
25-7
5
16
28-3
6
16
16 13
1-9.5
44-6
340
89-1
Length of the charge of 16 oz was 11-2 inches:
The pendulum had been altered since the former day.The core of lead being taken out, some layers of rope werelaid at the bottom of the hole, then the remainder up to thefront filled with a piece of sound elm, and the face coveredwith sheet lead.
At the last round, or that with ball, the iron tonguewhich held the tape of the pendulum, having slipped downby the loosening of a screw, was strained and bent. Whichstopped the experiments till it could be repaired.
A a2