17 6 Captain Sabine’s experiments to determine the 
Whilst the observations which have been detailed were 
making in 1819, it suggested itself, (at first only as a matter 
of curiosity), to ascertain what difference would take place in 
the number of vibrations made in a day by each pendulum, 
on its being removed into the clock numbered differently 
from itself. Accordingly before the instruments quitted 
Portland-place to be embarked, No. 1 pendulum was shifted 
into the clock numbered 2, and No. 2 pendulum into clock 
No. 1, when the following observations were made ; the rate 
of 112 being supplied, as before, by Mr. Browne. 
Pendulum 1 in clock 2, London; Bar. mean height 30,2 inches. 
Chron. No. 112 losing 0,8*. per diem. 
1819. 
Clock fast 
of 112. 
Daily loss. 
Mean 
arc. 
Mean 
temp. 
Corrections. 
Daily 
Vibrations. 
Corrections. 
Corrected vi- 
brations, 
Temp. 45°. 
on 
112. 
on 
Time 
| 
Arc. 
Temp. 
Elevation. 
Buoy. 
Jan. 
m. S. 
s. 
s. 
0 
O 
s. 
S. 
S< 
5 Mid. 
6.02,5 
+ 
+ 
23.5 
2 4’3 
1.74 
46,25 
4>979 
°’S 5 
8638 1,229 
f + 
+ 
4 
5-39 
24 
24,8 
1775 
47> 2 5 
5,181 
0,99 
86381,371 
>0,3496 
<M 3 
86388,0967 
5 
S -»5 
24,1 
24,9 
177 
4 7>5 
SOS 2 
i,i 
86381,352 
3 
6 
4 S °>9 
Pendulum 2 in clock 1, London; Bar. mean height 30,2 inches. 
Chron. No. 112 losing 0.8'. per diem. 
Clock fast 
of 112. 
Daily gain. 
Mean 
arc. 
Mean 
temp. 
Corrections. 
Daily 
Vibrations. 
Corrections. 
1819. 
on 
112. 
on 
Time. 
Arc. 
Temp. 
Elevation. 
Buoy. 
1 J an ' 
3 Mid. 
h. m. s. 
0.58.575 
s. 
*36,4 
s. 
I35* 6 
0 
°» 9 1 3 
0 
49 
S. 
+ 
*-373 
s. 
+ 
*75 
86538,723 
S. 
1 + 
s. 
4 
! 
1.01.13,9 
134,6 
00 
00 
0,983 
5 ° 
1 ,5 9 2 
2,18 
86537,572 
V°’ 35°3 
6,398 
I s 
1.03.28,5 
1 35>4 
I 34 > 6 
1 
50,5 
1,647 
2,4 
86538,647 
3 
j'6 
1 
1.05.43,9 
Corrected vi- 
brations. 
Temp. 45°. 
86545,062- 
Whence it appeared that tne penauium lnu. i, 
clock No. 2, would make 86388,0967 vibrations ; and the 
pendulum No. 2, vibrating in clock No. 1, 86545,0623 vi- 
brations, in a mean solar day, in vacuo , at the level of the 
sea, the temperature being 45 0 . 
