made with an invariable pendulum. 
253 
Experiment No. IV. 2 nd Series at San Bias ; 
By Mr. H. Foster. 
Comparisons of Clock with Chronometer 438, at San Bias ; 
{2nd Series .) 
Time by 
Chronometer. 
Time by Clock. 
Clock fast of 
Chronometer. 
h. m. s. 
h. m. s. 
h. m. s. 
4 6 51,5 
12 90 
8 2 8,5 
1 1 35 53>9 
7 38 0 
2 6,1 
1 6 5 4’ 7 
990 
2 5>3 
2 13 55,0 
10 16 0 
2 5 
4 4 
32 60 
8 1 59,0 
11 31 5,1 
7 33 0 
1 54>9 
11 54 5 > 2 
7 56 0 
1 54,8 
12 35 5>7 
8 37 0 
1 54.3 
1 5 5>9 
970 
1 54 >» 
2 12 6,5 
10 14 0 
1 53.5 
4 4 12,0 
12 60 
8 1 48,0 
11 26 16,2 
7 28 0 
1 43^8 
n 48 16,5 
7 50 0 
1 43.5 
1 2 3 i 7>4 
9250 
1 42,6 
4 3 25,9 
1250 
8 1 34.1 
11 43 3°>7 
7 45 0 
I 29,3 
12 24 31,0 
8 26 0 
I 29,0 
12 56 31,3 
8 58 0 
1 28,7 
1 l 9 3 2 >5 
9 21 0 
1 28,5 
1 45 3i»8 
9 57 0 
I 28,2 
2 3 32,0 
10 5 0 
1 28,0 
4 4 38,9 
12 60 
8 1 21,1 
Date. 
Barometer. 
Therm. 
Fahrenheit. 
1822, 
May 26th, Noon, 
P.M. 
27th, Noon, 
P.M. 
28th, Noon, 
P.M. 
29th Noon, 
P. M. 
Inches. 
29,88 
30th, Noon. 
29,87 
29,86 
29,82 
29,79 
29,76 
29 >77 
29,78 
29,78 
86,2 
8 4>5 
86,5 
84,8 
86,2 
85, 2 
87,0 
85.0 
88.0 
