22
NEW EXPERIMENTS
TRACT 34.
81. Saturday, September 25, IT34.
This day Major Blomfield alone tried some cartridges, of8 oz each, by firing them behind, before, and in the middle;but he found no sensible difference in the velocities.
He also discharged several low balls, weighing only 13 oz3 dr, and having about -15 of an inch windage; and the sameballs, when covered with leather, so as to fit closely in thebore : but the velocities were the same ; probably owing tothe fired powder quickly blowing off the leather.
The weight of the pendulum was increased 10 or 11 lb,namely, by 8 balls and 58 inches of plugs.
82. Monday, October 4, 1784 ; from 11 till 2.The weather dry, but cold and windy.
N°
Pow-
der
Vibration of
Point
struck
| Plugs |
Values of
Veloc.
of
ball
gun
pend
p
g
n
OZ.
inches
in
lbs
inches
feet
1
4
D 149
2
4
163
3
4
164
4
8
740
158
87-6
6
704-0
7T03
40-26
1440
5
8
742
166
88-2
6
705-0
7T05
40-26
1482
6
8
742
163
88-1
7
706-1
7T07
40-26
1482
7
8
729
158
87-6
6
707-1
77-09
40-25
1425
8
8
749
168
89'0
6
708-2
77-11
40-25
1517
9
8
751
166
88-8
6
709-2
77-13
40-25
1482
10
6
615
151
89-1
6
710-3
77-14
40-25
1367
11
6
604
150
90-2
7
711-3
77-16
40-25
1323
12
6
586
147
92-3
9
712-4
77-18
40-24
1289
13
6
610
152
91-9
8
7l3-4
77-20
40-24
1321
14
4
457
128
92-5
7
714-5
77-22
40-24
1124
15
4
453
120
92-4
8
715-5
77-24
40-24
1041
16
4
447
120
92'3
6
716-5
77-26
40-24
1059
17
2
270
85
91-5
5
717-6
77-27
40-23
747
18
2
271
85
91-2
4
718-6
77-29
40-23
762
19
2
279
87
91-4
4
719-7
77-31
40-23
768
20
4
459
128
92-3
5
720-7
77-33
40-23
1124