1S3
NEW EXPERIMENTS
TRACT 34.
N c
Pow-
der
!. t-'ngth
charge
Vibr
pend
Point
struck
Plugs
jWt
>
P
r alues of
g
71
Velocity
of
ball
oz
inches
c
inches
oz
lb
inches
feet
1
32
9-9
371
82-5
20
1801
76-90
40-4
1560
2
32
9-9
359
si-s
17
8
93
1 529d
3
32
9 9
389
84-4
19
16
97
1614
4
24
8-4
34 5
89-0
18
23
77-00
1362
5
24
8-4
327
86-9
22
30
04
1 328d
6
24
8-3
324
SO-6
20
32
07
1425
7
16
6-9
280
82'2
17
39
11
1238
8
16
6-8
298
90-6
15
46
14
1174
9
8
5-4
225
910
10
.53
18
886
! 10
8
5-3
226
93'2
10
60
21
872
The 2d and 5th rounds are doubtful, owing to accidents:the ball dropped out at the 5th round. After this day’s ex-periments, the pendulum was quite ruined. |
It vibrated 40’- per minute.
lb
OZ
small quantity, consi-dering how dry the
Its weight, July 28 was
1803
0
weather bad been : in-
Weight of 9 balls
o
54
13-t
deed it was all the time
Ditto of plugs . . .
10
8
closely wrapped up in
The sum is
1868
5 i
an oiled cloth, which
But wt at last . . .
1866
0
probably in a great
Theref. lost only . .
2
5-1-
measure prevented the
by evaporation ; which
is but a
evaporation.
180.
Sept.
21,
1791.
Attended the weighing and balancing the new pendulum,being an entire new block, of 52 inches long, and the face 23inches by 17. Its weight wds 1662lb. Dist. below bottomof axis to
Centre of gravity on one side . . . 74-8
Ditto on the other side.74'3
The mean theref. is.74 - 55
Add half diam. of axis.1*15
Centre of gravity below axis of motion 75-7