TEACT 34.
IN GUNNERY.
343
balls or wads. Out of the 20 barrels of powder, wereselected the 6 which had been found to be most uniform, andnearest alike, by the different eprouvettes at Purfleet, whichwere n os 2, 5, 13, 15, 18, 19 ; of which the first two onlywere tried this day, as below. The gun was the short one,n® 1, and weighed this day, with the leaden weights andiron stem, 906lb : the distance of the tape, by which thechord of its recoil was measured, was not taken, and it wasprobably a little more than the usual length, 110 inches,employed in most of the experiments of this year.
Here it appears that the quantity of recoil increased in ahigher ratio than the quantitj^ of powder.
The pendulum was not moved by the blast of the powderin these experiments.
No. of
Powder
Chord of
Medium of
Experim.
sort
weight
recoil
recoil
oz
inches
i
f
2
2-25
)
2
n°2]
2
2-35
y 2-30
3
£
2
2-30
)
4
2
2-55
)
5
n° 5
2
2'40
>- 2-50
6
l
2
2'55
3
7
8
n° 5 £
8
8
13-00
12'75
00
00
Ol
9
10
n° 2 ^
8
8
12-50
12-50
| 12-50
39. Saturday, June 7, 1783 ; from 9\ A. M. till 12.
The weather cloudy or hazy, but it did not rain.
Barometer 30’25, Thermometer 60°.
To try all the 6 sorts of powder, and the effect of theblast on the pendulum, when high charges are used.
The first 14 rounds were with the same apparatus and gunn° 1, as the former day. The other four rounds were withthe gun n° 4, but without the leaden weights; it weighedwith the iron 56lib.