XXXVI 
Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General’s Office, Calcutta, 
in the month of September, 1860. 
Hourly Means, &c. of the Observations and of the Hygrometrical elements 
dependent thereon. — ( Continued .) 
Hour. 
Mean Wet Bulb 
Thermometer. 
Dry Bulb above Wet. 
Computed Dew point. 
Dry Bulb above Dew 
point. 
Mean Elastic force of 
Vapour. 
Mean Weight of Va- 
pour in a Cubic foot 
of Air. 
Additional Weight of 
vapour required for 
complete saturation. 
Mean degree of Hu- 
midity, complete satu- 
ration being unity, , 
0 
0 
0 
0 
Inches. 
Troy grs 
Troy grs 
Mid- 
night. 
79.9 
1.8 
79.0 
2.7 
0.970 
10.44 
0.93 
0.92 
1 
79.8 
1.6 
79.0 
2.4 
.970 
.46 
.81 
.93 
2 
79.6 
1.6 
78.8 
2.4 
.964 
.40 
.81 
.93 
3 
79.5 
1.4 
78.8 
2.1 
.964 
.40 
.70 
.94 
4 
79.4 
1.3 
78.7 
2.0 
.961 
.37 
.67 
.94 
5 
79.4 
1.3 
78.7 
2.0 
.961 
.37 
.67 
.94 
6 
79.3 
1.3 
78.6 
2.0 
.958 
.34 
.67 
.94 
7 
79.8 
1.5 
79.0 
2.3 
.970 
.46 
.78 
.93 
8 
80.5 
2.6 
79.2 
3.9 
.976 
.48 
1.38 
.88 
9 
81.0 
3.4 
79.3 
5.1 
.979 
.48 
.83 
.85 
10 
81.3 
4.2 
79.2 
6.3 
.976 
.43 
2.29 
.82 
11 
81.4 
4.9 
78.9 
7.4 
.967 
.32 
.70 
.79 
Noon. 
81.6 
5.3 
78.9 
8.0 
.967 
.30 
.95 
.78 
1 
81.5 
5.5 
78.7 
8.3 
.961 
.24 
3.05 
.77 
2 
81.6 
5.3 
78.9 
8.0 
.967 
.30 
2.95 
.78 
3 
81.2 
4.9 
78.7 
7.4 
.961 
.26 
.69 
.79 
4 
81.1 
4.4 
78.9 
6.6 
.967 
.32 
.40 
.81 
5 
80.9 
3.7 
79.0 
5.6 
.970 
.37 1 
.02 
.84 
6 
80.6 
3.0 
79.1 
4.5 
.973 
.42 
1.61 
.87 
7 
80.5 
2.5 
79.2 
3.S 
•976 
.48 
.34 
.89 
8 
80.3 
2.3 
79.1 
3.5 
.973 
.45 
.23 
.90 
9 
80.3 
2.1 
79.2 
3.2 
.976 
.50 
.11 
.90 
10 
80.2 
1.8 
79.3 
2.7 
.979 
.53 
0.94 
.92 
11 
1 
80.0 
1.8 
79.1 
2.7 
.973 
.47 
.93 
.92 
All the Hygrometrical elements are computed by the Greenwich Constants. 
