374

NEW EXPERIMENTS

TRACT 34.

The Gun n° 3, with every circumstance us usual; exceptthat in the last four rounds it had 15' elevation.

The Pendulum had been repaired, the balls and plugstaken out, a square hole cut quite through, and a soundpiece fitted in; and the face covered with sheet lead asbefore.

Its weight at the beginning 663 lbTo the centre of gravity - 77 - 35 inchesTo the tape - - . - - - 117-8

The vibration at n° 8 a little doubtful, as the tape broke.

The plugs weighed 1 oz per inch.

The value of i, or the mean distance of the points struck,

87-3.

Weight of Powder - - - -

2 oz

4 oz

Mean length of the charge -

1-9

3-2

Mean recoil with ball - -

11-03

17-95

Ditto without

2-62

6-48

Difference, ore— - - -

8-41

11-47

Hence velocity by the recoil

928

1266

Mean ditto by the pendulum

926

1334

Difference, recoil less -

— 2

68

Or nearly the part , - -

t£t

I

Tiy