140
NEW EXPERIMENTS
TRACT 34 .
dulum as left hanging Sept. 22 ; the balls as before, viz, di-ameter 3'56 inches, and weight 6lb 1^-oz. The lengths ofthe bore and weight of the guns, were thus :
Medium Gun.
Light Gun.
Eprouvette.
Length of bore
56 - 65 inc.
57-6
Di.tm. of bore
3-65
3-65
Wt. of gun
11731b.
605
Oz Chord.
2 42£
2 43
N°
Lt not!,charge
Recoil
gun
Vibr
pend
Point
struck
Plug’s
wt
Values of
Velocityof ball
p
S
n
inches
;ne lies
c
inches
oz
lb
inches
feet
1
8 2
44
373
86-8
13
172S
76-04
40-35
1416
2
8-2
44
386
90-0
13
1735
08
36
1420
3
8-3
78
378
88-5
12
1744
12
36
1420
4
8-2
83
397,
90-5
12
1749
16
36
1465
183. Sept. 26, 1791.
Took down the pendulum, to he repaired.
Its weight at first was . .. 1662lb
Add balls and plugs, Sept. 22 66£
Ditto Sept. 24 . 27j .
The sum of all 1756
It weighed now.1755
Theref. lost by evaporation only 1
184. Sept. 27, 1791.
The pendulum having been repaired, it was weighed andbalanced this morning.
Its weight wasSheet-lead facingThe sum of bothCent, of grav. below
axis.
Ditto on the other sideMean of both . .
17591b
19
1778
76-3inc.76-176-2 .
This distance,76’2,is exactlywhat it comes to, by calcu-lation, viz, from the weightof balls and plugs lodged inthe pendulum Sept. 22 and24.