Upon Gunpowder, &c* 287 
By the following table the refult of thefe. experiments may 
be feen at one view. 
The experiments. 
t 
<5£ 
O 
O 
ff)- 0 
*5 
£ 
The barrel hea- 
vier than the 
bullet. 
The recoil. 
Velocity of the 
bullet. 
Difference. 
<u ^ 
^ '0 
>> 0 
PQ Z 
By the 
pendulum 
W 
Grs. 
W~ 
C=i 
V — 
V — 
= 4,4 
u/plil £1110 Q 
85 th 
90 
3133,3 
7,16 
2109 
1763 
4-346 
86th 
231 
1 33 8 > 6 
9,62 
143O 
i3f7 
+ ”3 
r -3 
i-J 
00 
354 
949,15 
n>°3 
1288 
1136 
+ 152 
88 th 
6 go 
560, 
15,22 
1240 
1229 
4- 11 
89th 
663 
557>22 
I 5, I 3 
1224 
1229 
+ 5 
96 th 
1184 
283,78 
2l>92 
1017' 
978 
- 39 
91ft 
1754 
191,56 
27,18 
893 
916 
- 23 
92d 
2352 
141,86 
32,25 
812 
833 
— 21 
The charge of powder Confifted of 
each experiment 6 
:45 grains in weight in 
In order to Ihew, in a more Bribing manner, the refult of 
thefe experiments, and the comparifon of the two methods of 
afcertaining the velocities of bullets, 1 have drawn the fig. 16* 
where the numbers that are marked upon the line AB are taken 
from A towards B, in proportion to the weights of the bullets ; 
while the lines drawn from thofe numbers perpendicular from 
AB (as w, for inftance, at the number 2352) and ending at 
the curve c , d, exprefs their velocities, as fhewn by the pendu- 
lum. The continuation of thofe lines on the oppofite fide of 
the line AB fhew the recoil, and alfo the velocities of the bul- 
lets as determined from it ; thus w, 7% and the (dotted) lines 
2 Qj2 parallel 
