98 
CAPTAIN SABINE ON THE DIFFERENCE IN THE VIBRATIONS 
July 9th. Clock making 86400 Vibrations. Barom. 29*48 } 
No. of i 
Coincid. j 
Therm. 
Times of 
Arc of 
Mean 
Interval. 
Correction 
for Arc. 
Reduct, 
to 72°. 
Corrected Vibra- 
tions in a Mean 
Solar Day at 72°. 
Disapp. 
Re-app. 
Coincidence. 
Vibration. 
1 
11 
21 
31 
41 
51 
61 
71 
O 
71.5 
71-7 
71.7 
71.6 
71.6 
71.7 
71.6 
71.7 
m s 
33 45 
38 13 
42 50 
47 32 
52 16 
56 58 
01 43 
06 25 
m s 
33 48 
38 18 
42 58 
47 44 
52 31 
57 22 
02 13 
07 08 
h m s 
9 33 46.5 
10 38 15.5 
11 42 54.0 
12 47 38.0 
1 52 23.5 
2 57 10.0 
4 01 58.0 
5 06 46.5 
1.40 
0.95 
0.63 
0.45 
0.31 
0.21 
0.16 
0.11 
s 
386.90 
387.85 
388.40 
388.55 
388.65 
388.80 
388.85 
s 
+ 2.23 
+ 1.00 
+ 0.47 
+ 0.23 
+ 0.11 
+ 0.05 
+ 0.03 
s 
- 0.17 
— 0.13 
— 0.15 
—0.17 
— 0.15 
— 0.15 
— 0.15 
85955.44 
85955.33 
85955.42 
85955.34 
85955.34 
85955.46 
85955.50 
71.73 
85955.40 at 72° 
Table E. 
Determination of the rate of the clock by Graham, with which the pendulum 
was compared in the experiments at Greenwich between the 21st and 
26th of July inclusive : by Mr. Taylor. 
“ The rate of the clock was obtained from comparisons with the transit 
clock at the time that the observations were making for the determination of 
the rate of the latter ; thus resting the accuracy of the results on the correct 
determination of the rate of the transit clock, for which purpose the following 
observations have been selected from the Greenwich observations : 
1828. 
July 21 a.m. 
Capella 
(3 Tauri . . 
a Orionis . . 5 46 47-24 
Observed Place, 
h m s 
5 4 55.92 
5 16 21.40 
22 a.m. (3 Tauri 5 16 20.98 
23 a.m. Aldebaran 4 26 58.62 
Capella . . 5 4 54.96 
Pollux ... 7 35 41.04 
25 a.m. Aldebaran 4 26 57-56 
Capella . . 5 4 53.90 
Rigel 5 7 9-80 
P Tauri 5 16 19.38 
26 p.m. a Cor. Bor. 15 28 18.10 
a Serpentis 15 36 42.10 
Apparent Place, 
h m s 
5 4 1.69 
5 15 27-22 
5 45 53.04 
5 15 27-25 
4 26 5.41 
5 4 1.75 
7 34 47-96 
4 26 5.46 
5 4 1.82 
5 6 17-74 
5 15 27.33 
15 27 26.79 
15 35 50.83 
Error of Clock. Mean. 
+ at5 h 23 m 
Rate 
in 24 h . 
54.18 
54.20 
+ 54".20 
53-73 j* 5 ' 3 ’.73- 0 ' U7 
53.21 5 5 3 i?i7-0''.55 
53.08 J + 53 V 
52.10 
52.08 I at 4 h 59 m 
52.06 ( + 52". 07 
52.05 
51.3 n at 15 h 32 ra 
+ 51.27/ + 51".29 
— 0".56 
— 0".55 
