346
NEW EXPERIMENTS
TRACT 34.
Again, if we take successive differences between the samerecoils, and between these differences, and then betweenthe second differences, and so on, thus
4-5
10-8
24-7
53-3
6-3
13-9
28-6
7-6
14-7
7-1
the columns, as well as the lines, descending obliquely fromleft to right, have their numbers approaching, and atlength ending, in the ratio of 2 to 1, the same as the quan-tities of powder.
40. Friday, June 13, 1783 ; from 11 till 1 o’clock.
The air moist, with small rain at intervals.
The gun n° 2 was mounted, and loaded with all the leadenweights: it was charged with the following quantities of.powder ; sometimes with a ball, and sometimes without one,as denoted by the cipher 0, in the columns of weight anddiameter of ball. The radius to the tape was 110-2. Asthese experiments were made only to discover if the leadenweights would render the gun sufficiently heavy, that thej-ecoil might not be too large with the high charges of pow-der and ball, the pendulum block was removed, to let the.balls enter and lodge in the bank which was behind it.
No.
Powder
Ball’s
Recoil
sort _
Wt
diameter
Wt
0 z
inches
oz
dr
ipches
1
19
2
0
0
2-5
2
19
2
0
0
2-5
3
19
4
0
0
b*2
4
19
8
0
0
13-5
5
19
16
0
0
28-1
6
18
16
0
0
28-0
7
19
2
1-9
15
4
8-9
8
19
4
1-9
15
4
16-15
9
19
8
1-9
15
4
26-5
10
19
16
1-9
15
4
41-75
11
18
16
1-9
15
4
34-3
12
18
16
1-9
15
4
35-15
IS
19
16
1-975
16
13
36-0
14
19
16
1-965
16
13
33-5