upon Gun-powder, &c. 253 
,» ' • 
In the feven following experiments the piece was fired with 
powder only. 
Order of the expe- 
riments. 
The 
charge of 
powder. 
Vent from the bot- 
tom of the charge. 
Chord of the amend- 
ing arc of the pen- 
dulum. 
Chord of the arc of 
the recoil. 
■ 
Remarks, 
Weight 
O 
Height. 
/ 
Grs. 
In. 
In. 
Inches. 
Inches. 
N° 
93 
145 
h 3 
O 
4,3 
• 
94 
165 
MS 
• • 
5 >S 
95 
5,6 
96 
290 
2,6 
• • 
n,7° 
97 
4371 
3,9 
'• ■ 
1,68 
*7,5 
The fcreen was taken away. 
98 
• \ 
£ * 
,, 00 
C The whole furface of the target was befpattered 
• • • • 
e • 
• • 
o>7 
15,00 
£ with unfired grains of powder. 
99 
• • 
« « 
• • 
G,9 
The pendulum was not obferved. 
In the following experiments N° 100. and N° 101. the bul- 
lets were not put down into the bore, but were fupported by 
three wires, which being faftened to the end of the barrel pro- 
jected beyond it, and confined the bullet in fuch a fituation that 
its center was in a line with the axis of the bore, and its hinder 
part was one-twentieth of an inch without or beyond the 
mouth of the piece. 
In experiment N° 102. the bullet was juft ftuck into the bar- 
rel in fuch a manner that near one-half of it was without the 
bore. 
Vol. LXXI. 2 M All 
