• upon Gun-powder , &c. 
e experi-j 
ts. 
The 
charge of 
powder: 
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i- 
(U cz. 
w U 
-0 c 
G <D 
it cu 
B U 
u *-» 
1 _ W5 
M ^ £ 
~ a 
Uh 
0 
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<D O 
<u 
• 
Order of th< 
men 
Weight. j 
Height. 
Vent lro.m 
tom of the 
p-> 0 
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J ^ 
CJ £ c 
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Remarks. 
:? L ( 
\T° 
Grs. 
In. 
In. 
Inches., 
Inches. 
Inches* 
Ft. in 
•fee. 
76 
H5 
h3 
O 
5?3 
65, 
13^5 
io 37 
! \ 7th day ; medium velo- 
77 
• • • 
• • 
. . 
... 
64,6. 
1 3r 2 5 
[O44 
■J city 1040. 
7^ 
3’ 2 
. . . 
8 92; 
20 grs. belt alkaline fait of tartar. 
' 70 
• • • 
• . 
• . 
4.35 
. . . 
1 1,68 
20 grs. aethiops mineral. 
: 80 
• « 
. • • 
0 0 
63,6 
9,83 , 
.20 grs. lal arnrnon^ 
81 
82 
- S xJ ■ 
4> 2 
6&4 
rh4S 
W5 
2 d grs. fine bra fs'-'dirf}. 
f The ferews wli'dh hel'd' the hooks 
j hy which tile pentlulum was fuf- 
| j pended gave way, and the pen- ■ 
1 L dulum came dawn. 
• • 
• • 
' 
; 83 
*14,35 
1 
• • 
* * 
• * 
1 
In the nine following experiments- viz., from N° 84. to N° 
92. inchifive, the” valve- vent was made nfe of, and- the bullets 
were made to fit the bore of the piece very exadtly by means of 
oiled leather, which was fo. firmly faffiened about them that in 
each experiment it entered the target with the bullet. 
The bullet made ufe of in experiment N° 85. was of wood, 
Thofeufedin the experiments N° 86; and N° 87. were formed 
in the following manner ; a fmall bullet; was caft of plaifier of 
Paris, which being thoroughly dried, and well heated at the 
fire, was fixed in the center of the mould that ferved for calling 
all the leaden bullets made ufe of in thefe experiments ; and 
melted lead being poured into this mould, the cavity that fur- 
rounded the fmall plaifter bullet was intirely filled up, and a 
bullet was produced, which to the eye had every appearance of 
folidity, but was as much lighter than a folid leaden bullet of 
the.; 
