PENDULUM AT THE ROYAL OBSERVATORY, CAPE OF GOOD HOPE. 167 
Rate of the Sidereal Clock. 
Dec. 14th. 
Dec. 15th. 
By a Arietis 
Aldebaran .... 
Capella 
Rigel 
(3 Tauri 
£ Orionis 
/3 Aurigae .... 
s 
— 0.53 
0.26 
0.50 
0.12 
0.34 
0.60 
0.74 
By a Ceti 
Aldebaran .... 
Capella 
Rigel 
/3 Tauri 
$ Orionis 
K 
S 
-0.74 
0.28 
0.50 
0.14 
0.44 
0.30 
0.39 
Mean Rate. . 
-0.44 
Mean Rate. . 
-0.39 
Mean Rate on the 18th by Mr. Fallows’s Observations 0.03 
Remark. — On the 16th and 17th the weather was unfavourable for observa- 
tion ; the quantity assumed for the rate of the clock on those days is a mean 
of its rate on the 15th and 18th : probably on the 17th the rate was less than 
that which has been assigned. 
Observations with the pendulum (Continued). 
1829- 
Attached 
Therm. 
Barom. 
Therm. 
No. of 
Coin. 
Disapp. 
Re-app. 
Time of Coin. 
Arc. 
Remarks. 
A. 
E. 
inches. 
O 
m 
s 
m s 
h 
in 
s 
20. i 
68.5 
29-972 
68.6 
69.0 
1 
9 
46 
9 55 
17 
9 
50.5 
1.67 
1 The Pendulum was 
73.7 
30.017 
73.0 
73.6 
21 
54 
19 
34 35 
18 
54 27.0 
1.12 
V not stopped be- 
J 
73.7 
30.017 
72.8 
73.4 
1 
59 
34 
59 49 
18 
59 
41.5 
1.12 
( tween these Ob- 
” l 
71.7 
30.010 
71.7 
72.0 
21 
44 
22 
44 37 
20 
44 29.5 
0.83 
J servations. 
„ / 
71-7 
30.010 
71.8 
72.0 
1 
1 
55 
2 5 
21 
2 
0.0 
1.60 
1 The Pendulum was 
” l 
73.5 
30.003 
73.0 
73.5 
21 
46 
18 
46 33 
22 46 
25.5 
1.31 
l not stopped be- 
/ 
73.5 
30.003 
73.2 
73.7 
1 
51 
31 
51 45 
22 
51 
38.0 
1.31 
f tween these Ob- 
” 1 
74.5 
30.003 
73.5 
74.0 
21 
36 
6 
36 22 
24 
36 
14.0 
0.90 
j servations. 
21. / 
67.0 
30.137 
68.8 
69.0 
1 
14 
28 
14 37 
15 
14 
32.5 
1.68 
J The Pendulum was 
l 
70.0 
30.145 
69-4 
69.9 
21 
59 
25 
59 41 
16 
59 
30.0 
0.91 
f not stopped be- 
J 
70.0 
30.145 
69.4 
69.9 
1 
4 
41 
4 57 
17 
4 
49.0 
0.90 
f tween these Ob- 
” 1 
72.0 
30.145 
70.0 
70.4 
21 
50 
1 
50 17 
18 
50 
9-0 
0.50 
j servations. 
„ / 
72.0 
30.145 
70.6 
71.0 
1 
7 
6 
7 17 
19 
7 
11.5 
1.60 
"j The Pendulum was 
73.0 
30.137 
70.2 
70.6 
21 
52 
3 
52 17 
20 
52 
10.0 
0.87 
v not stopped he- 
J 
73.0 
30.137 
70.5 
70.8 
1 
57 
18 
57 34 
20 
57 26.0 
0.86 
f tween these Oh- 
” l 
72.0 
30.116 
70.3 
70.6 
21. 
43 
34 
43 49 
22 
43 
41.5 
0.48 
j servations. 
J 
72.0 1 
30.116 
70.7 
71.3 
1 
59 
40 
59 49 
22 
59 
44.5 
1.70 
” l 
71.0 
30.114 
69.9 
70.2 
22 
49 
51 
50 9 
0 
50 
0.0 
0.87 
