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 ----- 1 XT'S

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.

Weigiit of Powder - - - 2 o z 4 025

Mean length of the charge - 1*9 3'2

Mean recoil with ball r - 11’03 17‘95

Ditto without ----- 2-62 fi - 48

Difference, or c — - - - 8-41 11‘47

Hence velocity by the recoil 928 1266

Mean ditto by the pendulum 926 1334

Dilference, recoil less - - —2 6ST

Or nearly the part - - - 7 | T ^