174 Captain Sabine’s experiments to determine the 
On the return of this expedition to England in the autumn 
of the following year, 1820, it was judged proper to repeat 
these observations, for the purpose of ascertaining whether 
any injury producing an alteration of rate, had been sus- 
tained by either of the clocks or pendulums during the voy- 
age; they were accordingly once more set up in Portland- 
place, and their going compared with Mr. Browne’s excellent 
clock by Cumming, the rate of which, losing 0,1 s per diem, 
was furnished by Mr. Browne ; the details are comprised 
in the following Tables III. and IV. 
TABLE III. 
Clock No. 1, in London; Barom. mean height 29,906. Cumming losing 0,1*. 
daily. 
Clock fast 
Clock’s loss. 
Corrections. 
Corrections. 
Corrected vi- 
1820. 
Per diem. 
Mean 
Mean 
Daily vibra- 
tions. 
of 
Cumming. 
on 
Cumming, 
on 
Cumming. 
on 
Time. 
arc. 
temp. 
Arc. 
Temp 
Elev. 
Buoy. 
Temp. 45°. 
m. s. 
s. 
s. 
s. 
0 
0 
s. 
S. 
s. 
S. 
Dec. 5 
18.02,1 
+ 
4" * 
X 9 
19 
19,1 
1.38 
49,14 
3-I3 2 
l.8l 1 
86385,843 
6 
i7-43>i 
1 8,6 
18,6 
18,7 
1.4 
50,1 
3.223 
2.224 
86386,747 
7 
8 
1 7 - 2 4»5 
19,5 
19.5 
19,6 
i-4 
50,2 
3-223 
2.268 
86385,891 
17.05 
+ 
+ 
i6 -45» 
x 9>9 
19,9 
20 
1.4 
5°,5 
3.223 
2.398 
86385,621 
^3>49 6 
6,335 
8 6392,3353 
9 
ig,i 
19,1 
19,2 
*•4 
5°»3 
3.223 
2.312 
86386,335 
16.26 
10 
20,2 
20,2 
20,3 
1. 41 
SGI 
3-27 
2.664 
16.05,8 
86385,634 
1 1 
76,8 
19,2. 
19,3 
1.4 
47>7 
3-223 
I.186 
86385,101 
»5 
14.49 
