lxxxiv 
Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of March, 1861. 
Hourly Means, &c. of the Observations and of the Hygrometricai elements 
dependent thereon. — (Continued.) 
Hour. 
Mid- 
night. 
1 
2 
3 
4 
6 
6 
7 
8 
9 
10 
11 
Hoon. 
1 
2 
3 
4 
5 
6 
7 
8 
9 
10 
11 
Mean Wet Bulb Ther- 
mometer. 
Dry Bulb above Wet. 
Computed Dew Point. 
1 
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 satu- 
ration. 
Mean degree of Hu- 
midity, complete 
saturation being 
unity. 
o 
0 
0 
0 
Inches. 
Troy grs. 
Troy grs. 
72.4 
3.8 
70.5 
5.7 
0.739 
8.03 
1.63 
0.83 
72.3 
3.4 
70.6 
5.1 
.741 
.07 
.44 
.85 
72 0 
3.2 
70.4 
4.8 
.736 
.02 
.35 
.86 
71.8 
2.7 
70.4 
4.1 
.736 
.04 
.14 
.88 
71.0 
27 
69.6 
4.1 
.717 
7.84 
.12 
.88 
71.0 
2.7 
69.6 
4.1 
.717 
.84 
.12 
.88 
70.2 
2.9 
68.7 
4.4 
.697 
.63 
.16 
.87 
70.4 
3.0 
68. 9 
4.5 
.701 
.66 
.21 
.86 
71.7 
5.1 
69.1 
7.7 
.706 
.66 
2.17 
.78 
72.4 
7.5 
68.6 
11.3 
.695 
.50 
3.28 
.70 
73.0 
9.7 
68.1 
14.6 
.684 
.32 
4.40 
".63 
73.9 
11.6 
68.1 
17.4 
.684 
.29 
5.43 
.57 
74.2 
13.6 
67.4 
20.4 
.668 
.09 
6.51 
.52 
74.4 
15.2 
66.8 
22.8 
.655 
6.93 
7.40 
.48 
74.4 
16.0 
66.4 
24.0 
.646 
.83 
.84 
.47 
74.2 
16.1 
66.1 
24.2 
.610 
.76 
.87 
.46 
73.5 
16.1 
65.4 
24.2 
.626 
.62 
.71 
.46 
74.0 
13.7 
67.1 
20.6 
.661 
7.01 
6.55 
.52 
73.9 
10.8 
68.5 
16.2 
.692 
.41 
5.01 
.60 
73.3 
8.4 
69.1 
12.6 
.706 
.58 
3.79 
.67 
73.2 
6.9 
69.7 
10.4 
.720 
.77 
.07 
.72 
72.7 
6.0 
69.7 
9.0 
.720 
.79 
2.62 
.75 
72.5 
5.3 
69.8 
80 
.722 
.82 
.31 
.77 
73.0 
4.5 
70.7 
6.8 
.744 
8.07 
1.97 
.80 
All tlie Hygrometricai elements are computed by the Greenwich Constants, 
