NEW EXPERIMENTS
TRACT 34*-
26 •
85. Monday , October 11 , 1784 \ from 11 till 2.The weather cold and cloudy.
Ball’s
Vibration of
Point
Values of
Veloc.
N°
weight
gun
pend
struck
Ph
p
S
n
ball
oz dr
inches
in.
it)
inches
feet
i
63
2
143
3
16 9
141
87-4
10
733-5
77-52
40-21
1357
4
9
2S5
160
85‘9
9
734-9
77-54
1569
5
8
275
150
86-8
7
736-4
77-56
1465
6
8
267
149
86-1
. 8
737-8
77-58
1470
7
8
268
145
862
8
739-3
77-60
1433
8
8
264
146
S7-0
9
740-7
7 7 4 62
1432
9
8
274
147
85-4
6
742-2
77-64
1472
10
8
272
148
86-5
7
743-6
77-66
1467
11
5
267
142
85-9
5
745-1
7T68
1436
12
5
261
137
86-5
9
746-5
77 - 70
1379
13
. 5
263
137
85-9
7
748-0
7T72
1392
14
5
269
143
-85-7
6
749 4
77'74
1459
mean
1444
The first charge of powder was 4 oz, all the rest 8 oz;the ball’s diameter 1-95.
The Gun n° 1, weighed 817 lb.
The Pendulum had its band repaired, which did nothowever alter its weight. The whole weighed this morning7 331; lb. Now the weight of the balls and plugs in the last5 days is 62 lb, which, being added to 683 lb,fthe weight ofthe pendulum on September 21, it makes 745 lb, which isHi lb more than it weighed this morning. For this defectI know' of no cause but evaporation : for in this time therewas no waste of leaden facing, as the other end of the blockwas used, which w'as not covered with lead. The timein W'hich this 1lq- lb was lost is 20 days, which is nearly attlTe rate of r a pound each day. This defect is thereforedivided equally among all the days.
The mean value of i, for the point struck these 8 days,is 88"8.