made with an invariable pendulum. 
271 
TABLE V. (1st. Series.) 
Vibrations of the Pendulum at Rio de Janeiro. 
The clock making 86359,42 Vibrations in a mean solar day, 
at a mean rate. 
Date. 
Barom. 
Therm. 
Difference 
of Tem- 
perature 
from 680 
Vibrations in 
24 hours. 
Corrections 
for 
Temperature. 
Vibrations, in 
24 hours in 
Temp. 68 . 
1822. 
Inches. 
Sept. 28 
P. M. 
29,87 
72,5 
4*5 
86123,78 
+ 1,90 
86125,68 
29 
A.M. 
2 9>93 
72,7 
4*7 
86123,88 
+ i *99 
86125,87 
P. M. 
29,87 
? 3 >° 
5*° 
86123,75 
-|-2> I I 
86125,86 
3 ° 
A. M. 
29,90 
73>6 
5*6 
86123,57 
+2*37 
86125,94 
P. M. 
29,85 
74 *° 
6,0 
86123,40 
+2,54 
86125,94 
Oct. 1 
A. M. 
29,80 
74 ’ 2 
6,2 
86123,57 
+2,62 
86126,1 9 
P.M. 
29,78 
74*7 
6*7 
86123,40 
+2*83 
86126,23 
2 
A. M. 
29,82 
75>o 
7*o 
86122,98 
+2*96 
86125,94 
P. M. 
29,80 
75*° 
7*o 
86122,90 
+ 2,96 
86125,86 
3 
A.M. 
30,02 
73 *° 
5*o 
86123,48 
+2,11 
86125,59 
P. M. 
29,99 
72,3 
4*3 
86123,47 
+ 1,82 
86125,29 
4 
A. M. 
30,00 
7i,5 
3*5 
86123,82 
+ 1*48 
86125,30 
P.M. 
29,96 
72,0 
4*0 
86123,82 
+ 1,69 
86125,51 
5 
A. M. 
2 9 > 93 
71,4 
3*4 
86124,13 
+ i ,44 
86125,57 
P. M. 
29,86 
72,2 
4,2 
86123,78 
+ 1,78 
86125,56 
Mean 
29,89 
73*i 
86125,76 
TABLE VI. (1st. Series.) 
By the Stars. 
From 
To 
Correct Vibrations 
in a mean solar 
day. 
No. of Stars 
observed. 
Interval of 
Seconds. 
Sum of the 
Factors. 
Sept. 1822. 
30th A. M. 
30th P. M. 
86125,40 
5 
1 
6 
1st P.M. 
86125,32 
3 
2 
6 
5 th P. M. 
86125,71 
3 
6 
18 
1st A. M. 
1st P.M. 
86125,38 
7 
1 
7 
5th P. M. 
86125,72 
s 
5 
25 
2nd A. M. 
5th P. M. 
86125,82 
4 
4 
16 
Mean by Stars 
86125,5 6 
Sum of 
the Factors 
78 
