tract 34.
gunnery experiments.
47
part of the bore of the gun which every charge occupies : athing very necessary both to show the part of the bore,occupied by the charge, corresponding to the greatest orany other velocity of the ball, as also to compute a priori,from theory, the velocity due to every charge of powder.Now the length of the charge was taken at every experiment,by means of the divisions of inches and tenths marked on therammer, the mediums of most of them being specified foreach day in the preceding account of the experiments ; andthose mediums of each day are here in the following tablecollected and ranged in columns, each under its respectiveweight at top, extending from 2 to 20 ounces :
2
4
6
8
10
12
u
16
is
20
1-7
3-2
4'6
5'9
6-93
8-4
9-8
106
12-3
13-2
1-7
3'2
4-4
5'9
G-97
8'2
9-27
i ro
12-15
13-3
2-1
3'3
4-5
6-1
G-9
8-3
9-55
11-2
13-2
1-8
3-23
4-43
6-2
6-97
8-23
9-4
11-4
1-8
3-33
4-2
5-67
7-0
8-3
953
10'9
1'7
3-24
4'5
6-0
8-37
11-0
1-7
3-2
4-44
5-7
8-07
108
1-87
3-2
4-4
5-72
11-13
! 1-9
3-1
4-37
5*6
11-38
1-85
3-17
4-27
5-63
11-26
1-9
2'9
4-28
5'65
11-1
1-8
3'4
4-12
5*6
10-6
1-9
3-13
5-6
10-97
1-9
3'1
5-83
10-87
1-83
,3-08
5-7
10-85
1-73
3-4
5-77
10-79
3-1
5-88
3-0
5-45
2-95
5-4
3'0
5-74
3-1
5-8 £
3-1
5*4
3-03
4-84
4-8
1-82
3-15
4-38
5-6£
6-9£
8-2'
9-51
| 10-99
12-22
13-23
and in the lowest line are set down the means among all theformer mediums, or numbers in each column, the numbers