upon Gun-powder, See, 3x7 
fuppofe the denfity of the generated fluid is always uniform 
from the bullet to the breech, the velocity of the center of 
gravity of the powder or (which amounts to the fame thing) of 
the elaftic fluid, and the grofs matter generated from it will 
fee juft half as great is the velocity of the bullet. If therefore 
we put P to denote the weight of the powder, B the weight 
of the bullet, and v its initial velocity; then Bu+fP'u — 
B + 1 P x v will exprefs the momentum of the charge at the 
ioftant when the bullet quits the bore. 
If now, inftead of appertaining the relation of the velocities 
to the weights of the bullets, we add half the weight of the 
powder to the weight of the bullet, and compute the velo- 
cities from the reciprocal fub-triplicate ratio of the quantity 
B + ! P in each experiment, the table will Hand thus : 
Velocity of the bullet. 
Weight of the 
bullet and half 
A&ual. 
Computed. 
Error of the 
9 2d exp. 
the powder. 
B + i P = 
2352 + 72 | 
812 
8x2 
theory. 
95 ft 
1754 + 72! 
8 93 
892 
[~ * 
90th 
5184+72! 
10X7 
IOII 
- 6 
89th 
603 + 72 ! 
1224 
1243 
;+ 19 s 
88th 
600+72! 
1240 
1245 
!+ 5 
87 th 
35 4 + 7 2 i 
1288 
■1449 
|+ 161 
86 th 
25I+72f 
I43O 
00 
1+159 
85 th 
90 + 72! 
2X09 
l 999 
^ X X© 
Vol. LXXI. 
