Mr. Thompson’s Experiments 
.remain after the explofion of guti-pdwder are carried forward 
with the generated elaftic fluid, and being carried forward 
retard its motion. — But to return from this digreflkm. 
As it appears from thefe experiments, that the relation of the 
velocities of bullets to their weights is different from that which 
Mr. robins’ s theory fuppofes, it remains to inquire what the 
law is which a&ually obtains. And, firft, as the velocities 
bear a greater proportion to each other than the reciprocal fub- 
duplicate ratio of the weights of the bullets, let us fee how 
near they come to the reciprocal fub-triplicate ratio of their 
weights.. 
-olev aril bin 'Jidhsii ?.:L r :;h : ' mb wm 
Velocity of the bullet 
< ; \ 
Weight Computed. A£ual. Computed. 
of the — — 
bullet. Recip. fub- Error of Error of Recip. fub- 
dup. ratio. the theory. the theory. trip, ratio. 
92d 
2352 
00 
8l2 
— 
S12 
91ft 
1754 
940 
+ 47 
8 93 
+ 2 
89s 
90tll 
II84 
M45 
00 
+ 
IOI7 
+ 4 
102 i 
89th 
603 
l604 
+ 3 8 ° 
1224 
+ 54 
1278 
88th 
600 
l608 
+ 368 
1240 
+ 4 ^> 
f 280 
87th, 
354 
2O93 
+ 805 
1288 
+ 239 
1527 
86th . 
251 
2486 
+ 1056 
1430 
4-282 
1712 
Ssth" 
90 
415I 
+ 2042 
2109 
+ 301 
2410 
Here the velocities computed upon the laft fuppofition appear 
to agree much better with the experiments than thofe com- 
puted upon Mr. robins’s principles ; but ftill there is a confi- 
derable difference between the a£tual and the computed veloci- 
ties in the three laft experiments in the table. 
As the powder itfelf is heavy, it may be confidered as a 
weight that is put in motion along with the bullet ; and if we 
fuppofe 
