2 36 
Captain Hall’s details of experiments 
TABLE V. 
Vibrations of the Pendulum at the Galapagos , 
computed at the mean rate of the clock, viz. 86340,64 Vibrations in a mean Solar Day. 
Date. 
A. M. 
or 
P. M. 
Middle time 
of each set 
of Coincidences. 
Barom. 
Therm. 
Vibrations in 
24 hours. 
Correc- 
tion for 
Temp. 
Vibrations 
in 24 hours, 
at 68° 
January 10 
— 1 1 
— 1 2 
— *3 
H 
— 15 
A.M. 
P. M. 
A.M. 
P. M. 
A. M. 
P. M. 
A. M. 
P. M. 
A. M. 
P. M. 
A. M. 
P. M. 
(Mean Solar Time ) 
h. m. 
10 4 
2 30 
7 23 
5 30 
7 00 
5 CO 
7 4 ° 
5 37 
8 4 
4 47 
7 *9 
4 46 
Inches. 
30,02 
29,90 
29,96 
29,90 
2 9.93 
29.90 
29,96 
29.91 
29.94 
29,89 
29,94 
29,89 
O 
85,1 
89.4 
76.4 
82.6 
75 . 0 
82.3 
75 »° 
79a 
79 . 8 
84.4 
77.6 
84.0 
86089,41 
86087,04 
86091.08 
86088.56 
86088,64 
86089.08 
86090.56 
86090,35 
86092,37 
86091,69 
86092,44 
86090,32 
7.23 
9>°5 
3.55 
6,18 
2,96 
6.06 
2,96 
4,69 
4.99 
6,94 
4.06 
6,77 
86096,64 
86096.09 
86094.63 
86094,74 
86091,60 
86095,14 
86093,52 
86095,04 
86097,36 
86098.63 
86096,50 
86097.09 
Mean 
29.93 
80,9 
86095,58 
The numbers in the above Table have been deduced from the rate of the clock 
between the 9th and 15th, viz. 59,36, losing. The corrections for temperature are 
at the rate of -f o%4Z3 for each degree of Fahrenheit above 68°. 
TABLE VI. 
By the Stars. 
Mean of 
Final Cor- 
No. of 
Mean of the 
Computed 
Transit be- 
rection for 
Corrected 
Stars 
Interval 
From 
To 
Times in the 
Vibrations in a 
fore or after 
unequal 
Vibrations in a 
obser- 
of 1 
intervals. 
mean solar day. 
Coincidence. 
rate. 
mean solar day. 
ved. 
Transits. | 
Day. 
h. m. 
before 
1 
1 
10 A. M. 
10 P. M. 
10 
0 17 
86096,46 
2 h 47 m 
+,04 
86096,50 
7 
1 
7 ! 
10 A. M. 
13 P. M. 
I I 
1 2 20 
86095,40 
2 24 
,00 
86095,40 
5 
4 
20 ; 
10 A. M. 
14 P. M. 
I 2 
0 21 
86095,58 
3 4 
— ,10 
86095,48 
9 
5 
45 ! 
10 A. M. 
1 5 P. M. 
12 
12 18 
86095,58 
3 3 6 
— ,1 1 
86095,47 
3 
6 
18 
11 A.M. 
13 P. M. 
I 2 
0 22 
86094,96 
2 31 
— ,08 
86094,88 
6 
3 
18 
ii A.M. 
14 P. M. 
I 2 
12 23 
86095,34 
3 12 
— ,10 
86095,24 
9 
4 
3 6 
11 A.M. 
15 P. M. 
13 
0 19 
86095,42 
3 3 8 
— ,1 1 
86095,3 1 
3 
5 
15 
14 A. M. 
14 P. M. 
*4 
0 25 
86096,35 
2 5 ' 
—,09 
86096,26 
7 
1 
7 
14 A. M. 
15 P. M. 
*4 
12 14 
86095,75 
2 1 8 
—,07 
86095,68 
1 
2 
2 
15 A.M. 
15 P. M. 
l 5 
0 2 
86095,35 
3 29 
+,°7 
86095,42 
3 
1 
3 
(Mean Solar 
— 
Sum 
of 
Time. 
Mean by the Stars 
86095,56 
Factors 
171 
