IN THE OBSERVATORY OF GREENWICH. 
473 
Abstract of the Experiments for the Rate of the Pendulum. 
I. Slider at 1.633. a. Weight below. 
Reference. 
Gauge. 
Temp. 
Duration of 
experiments. 
Vibrations. 
| Correction 
to M. T. 57°. 
Reduction 
to a Vacuum. 
Corrected Vibrations at 
57° in a vacuum. 
inches. 
h m s 
H 
1.207 
57-37 
13 58 29 
86068.49 
+ 0.16 
+ 0.48 
86069-13 
I 
0.930 
56.61 
9 17 09.5 
86069.04 
— 0.17 
+ 0.37 
86069.24 
K 
1.365 
56.25 
14 35 26.5 
86068.80 
— 0.33 
+ 0.55 
86069.02 
L 
0.938 
56.67 
8 48 33 
86 O 69 .OI 
— 0.14 
+ 0.37 
86069.24 
M 
1.615 
57.47 
14 05 25 
86067.99 
+ 0.21 
+ 0.65 
86068.85 
1.211 
56.87 
60 15 03 
86068.67 
— 0.06 
+ 0.48 
86069-10 
I. Slider at 1 .633. b. 
Weight above. 
P 
1.442 
56.70 
4 55 48 
86068.67 
—0.13 
+ 0.66 
86069.20 
Q 
1.650 
56.70 
4 41 01 
86068.45 
— 0.13 
+ 0.75 
86069.07 
R 
1.685 
56.55 
8 32 43.5 
86068.45 
-0.20 
+ 0.76 
86069.01 
S 
1.512 
57.55 
6 15 10 
86068.34 
+ 0.24 
+ 0.69 
86069.27 
1.572 
56.87 
24 24 42.5 
86068.48 
-0.06 
+ 0.72 
86069.14 
II. Slider at 1.566. 
b. Weight above. 
T 
1.222 
58.00 
5 46 36.5 
86068.76 
+ 0.44 
+ 0.56 
86069.76 
U 
1.460 
57-00 
9 45 39 
86068.83 
0.00 
+ 0.67 
86069.50 
V 
1.115 
56.60 
6 44 40 
86069.24 
-0.17 
+ 0.51 
86069.58 
1.266 
57.20 
22 16 55.5 
86068.94 
+ 0.09 
+ 0.58 
86069.61 
II. Slider at 1.566. 
a. Weight below. 
w 
0.950 
56.85 
15 03 24 
86068.72 
— 0.07 
+ 0.38 
86069-03 
X 
1.055 
56.40 
13 01 03 
86068.78 
— 0.26 
+ 0.42 
86068.94 
Y 
1.165 
56.50 
13 01 05.8 
86068.82 
— 0.22 
+ 0.46 
86069.06 
Z 
0.985 
56.95 
10 21 25.7 
86068.70 
-0.02 
+ 0.39 
86069.07 
A A 
0.900 
57-30 
15 46 32 
86068.56 
+ 0.13 
+ 0.36 
86069.05 
B B 
0.895 
57.60 
9 01 09.5 
86068.41 
+ 0.26 
+ 0.36 
86069.03 
C C 
0.920 
56.80 
9 30 48.5 
86068.67 
-0.09 
+ 0.37 
86068.95 
DD 
1.070 
56.50 
9 23 49 
86068.97 
— 0.22 
+ 0.42 
86069-17 
E E 
1.030 
56.50 
17 36 24 
86068.89 
-0.22 
+ 0.42 
86069.09 
1.000 
56.82 
112 45 41.5 
86068.72 
— 0.08 
d 0.40 
86069.04 
The letters of reference in the first column are to the detail of the experi- 
ments at the close of the paper. 
3 p 2 
