in the length of the pendulum vibrating seconds. 
427 
APPENDIX. 
CONTAINING THE OBSERVATIONS FROM WHICH THE 
PRECEDING RESULTS WERE COMPUTED. 
Observations for determining the rate of the clock . 
With respect to the following Table of Transits it may be 
necessary to remark that the results in the column headed 
“ Mean Chronometer/’ were obtained by taking the mean 
of the 1st and 5th wires, of the 2d and 4th, and again taking 
the mean of these means and the third wire, instead of tak- 
ing the mean of the five wires, which is the usual method. 
This was done for the sake of comparing the result of each 
pair of wires with that of the meridian wire. 
Transits observed at Unst. 
Date. 
Stars. 
1 
2 
Merid. wire. 
3 
4 
5 
Mean 
Chronometer. 
Clock. 
1818. 
July 22 
Arcturus 
» Ophiuchi 
n Serpentis 
a Lyrae 
a . Orionis 
h. m. s. 
6. 8.14,0 
9. 
10.12.15,0 
10.30.42,5 
21.43.41 
m. s. 
8.36,5 
12.36,0 
3 1 - 9*5 
44. 2,5 
m. s. 
8.59,0 
50 . 9*5 
12.57,0 
31-36,5 
44 - 2 3*5 
m. s. 
9.21,5 
13.18,5 
32. 4,0 
44.45,0 
m. s. 
9.44,0 
1 3 - 39*5 
32 - 3 o *5 
45- 6,5 
h. m. s. 
6. 8.59 
9.50. 9,5 
10.12.57,17 
10.31.36,58 
21.44.23,67 
h. m .s 
6.14.18,14 
9.55.36,41 
10.18.25,08 
10.37- 5 
21.50.15,3 
24 
G ’s centre. 
0. 6.27 
6.49,5 
7.12,25 
7-35 
7-57 
0. 7.12,17 
o *3 59*32 
z 5 
a Ophiuchi 
> Ophiuchi 
n Serpentis 
« Lyrae 
9 -* 5 - 2,5 
10. 0.23,5 
10.18.50,5 
15.24 
37 - 57*5 
o- 45*5 
1 9- 1 7 * 5 
15 - 45*5 
38.19 
1. 6,5 
1 9-44 
16. 7,5 
38.40,5 
1.27,5 
20.12 
16.29 
1.49 
20.38,5 
9.15.45,62 
9.38.19 
10. 1. 6,41 
10.19.44,41 
9.23.43,56 
9.46.18,1 1 
10. 9. 6,1 
10.27.44,82 
26 
0 ’s centre. 
0. 6.24,5 
6.46,75 
7 - 9*25 
7 * 3 I *75 
7 - 54*5 
0. 7. 9,33 
0.15.41,63 
Oil wai applied to the scapement without stopping the clock. 
3K 
MDCCCXIX. 
