34 6 Mr. Thompson’s Experiments 
1 
der of the expe- 
riments. 
T 
char 
pow 
■>-> 
* o 3 
he 
ge of 
der. 
4 -> 
JZ 
bp 
nt from' the bot- 
m of the charge. 
ord of the afcend- 
ig arc of the pen- 
,1 lum. 
ie bulletftruck the 
get below the axis 
the pendulum. 
ord of the arc of 
the recoil. 
Velocity of the 
bullet. 
Remarks. 
5 
£ 
<u 
UJ 
OJ c 
>• 
SZ, u _~ 
CJ’~ 
u , 
-Sc 
U 
Grs. 
In. 
fn. 
Inches. 
Inches. 
Inches. 
Pt.in 
fee. 
N° 5 
208 
i,8 
0 
12,6 
65? 
17,8 
1213 
Second day. 
■4 
• • 
• • 
>5 
• 
18,5 
— 
The pendulum gave 
way. 
5 
« . 
• « 
0 
- — 
38,68 
— 
4 bullets were fired ; 
at once. 
6 
, , 
• • 
>5 
38,48 
— 
Ditto. 
' 7 
• • 
. * 
0 
6,1 
— 
Without, any bullet. 
8 
416 
3 > 6 
. 


16,5 
— 
Ditto. 
9 
208 
1,8 
O 
8,5 
6 5 > 
17,69 
1281 
Pen. N°2; very fair; 
3d day. 
10 
104 
>9 
• *• • ‘ 
5,2 
65.25 
10,18 
782 
1 1 
3 IQ 
2,7 
O 
9,6 
64,6 
24,69 
H 59 
12 
• • 
1,22 
10,1 
0 
65. 
2 4)95 
1527 
The nowder was 
lighted 
; 23 
14 
33 ° 
2,9 
2,65 
2,-65 
11,85 
10,9 
10,9 
64.75 
65.25 
61,5 
24)9 
26,2 
r 801 
1646 
1748 
1 i vT! 
^ by the long vent-tube 
, (%• 4 -)- 
l6 
. . 
. . 
* 3> 2 5 
63.5 
. . . 
2060 
J 
17 
33 ° 
2)7 
2,65 
12,7 
. . 
The barrel very much heated. 
18 
. . 
2,9 
O 
10 A* 
63.5 
26,3 
1619 
.1 .. ' — j — 
I 9 
. . 
. . 
. • 
• • • 
63, 
26,^ 
1633 
■ 20 
i ,45 
0 
! 6,8 
62,2 
H )73 
1084 
21 
6,85 
• • • 
14)2 
io 93 
22 
• • 
• « 
;.r >32 
6,7 
• • • 
14)8 
107 1 
•'23 
• . 
J c 
. . 
6 3 
60,6 
i 4)58 
I0 35 
r The fhort vent-tube (v. 
! ,'.24) 
h 5 
■ 01.5 
14,68 
1 142 
\ fig. 3. ) was made 
ufe of. r 
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 
