* 
24^ 
Mr, Thompson’s Experiments 
\ 
CO 
CU 
X 
09 cn 
. m -*-• 
The 
charge of 
powder. 
the bot- 
; charge. 
4— ' C 
09 
U-i r- 
0 .£ 
Ui 
09 
-p 
5 
Weight. 
4-J 
r~ 
t bp 
‘ V 
n H 
Vent from 
tom of the 
Grs. 
In. 
In. 
N° 2 
208 
1,8 
0 
4 
• 0 
• 0 
,5 
5 
0 • 
0 e 
0 
6 
• 0 
0 e 
,5 
7 
0 • 
• 9 
0 
8 
416 
3,6 
1 0 
9 
208 
1,8 
0 
10 
104 
,9 
• 0 
1 1 
31° 
2,7 
O 
12 
• 0 
0 9 
1,22 
13 
9 • 
0 9 
2,65 
1 /. 
• 
9 0 
9 9 
15 
33° 
2,9 
2,6 5 
16 
• • 
0 • 
e • 
17 
33° 
2,7 . 
2,65 
18 
• • 
2,9 
O 
*9 
165 
2C 
b 45 
O 
21 
. 22 
0 0 
0 0 
nS 2 
23 
t 24 
• • 
9 • 
O 6 
i i 
o G 
w <D 
09 Cu 
^ 09 
09 ^ 
^ <4-. 
4-J Q 
CJ 
u. 
bjQ 
jG G , 
cj 
o 
T3 
QJ <0 
■S '* 
. C3 • 
O « E 
3 'C D 
* l-S 
in Q C 
r: oj ^ 
a 22 *— 
,n +j u 
<u _a 
^ bJO^ 
-2— J- , 
^ r 
-A~J O 
Inches. 
12,6 
8.5 
'5, 2 , 
9.6 
10,1 
11,85 
10.9 
10.9 
13 , 2 5 
« • • 
10,4 
6,8 
6,85 
6,7 
6 3 
7,5 
Inches. 
6 5, 
65, 
65=25 
64,6 
65, 
64,75 
65,25 
61.5 
63>5 
• © • 
63.5 
A o 
Vj 9 
62,2 
60,6 
61,5 
O 
(J 
v o 
<3 u 
"Z 09 
O 09 
~G 
nd 4-» 
u 
O 
a> 
-G 
« 
O 4~> 
aj 
.tt-3 
09 
> 
U 
Inclie 
17.8 
18.5 
38.68 
38,48 
6,1 
16.5 
j 7> 6 9 
10,18 
24.69 
24,95 
24.9 
• • • 
26.2 
• • • 
12.7 
26.3 
26.4 
i4,73 
14,2 
14.8 
14,58 
14,68 
ft. in 
fee. 
1213 
1281 
782 
1459 
1527 
1801 
1646 
1748 
2060 
0 • 
1619 
i6 33 
1084 
1093 
1 07 1 
io 35 
2 142 
Remarks. 
Second day. 
The pendulum gave way. 
4 bullets were fired at once. 
Ditto. 
Without any bullet. 
Ditto. 
Pen.N°2; veryfairj 3d day. 
The powder was lighted 
]■ by the long vent-tube- 
(fig. 4.). 
'he barrel very mucKheated, 
f The fliort vent-tube (v, 
I fig. 3.) was made ufe of. 
In order to determine' how much of the force of the powder 
was loft by windage and by the vent, oiled leather was faftened 
round' the bullet, fo that it now accurately fitted the bore of 
the piece; and in the five experiments, from N° 35. to N° 39. 
inclufive, the valve-vent was made ufe of. 
Weight of the bullet, together with the leather in which it 
was enveloped, 603 grains,- 
Order 
