XX Meteorological Observations. 
Abstract of the Results of the Hourly Meteorological Observations 
taken at the Surveyor General's Office, Calcutta, 
in the month of October, 1863. 
Hourly Means, &c. of the Observations and of the Hygrometrical elements 
dependent thereon.—( Continued ). 
FA 3 
a S 
2 > 
=} lo} 
Hour.| Su 3 
Bee pea 
$4 ie 
Ss a 
0 0 
Mid- 
ene 76.2 2.7 
1 75.9 2.6 
2 75.8 2.4 
3 75.5 2.5 
4, 74.6 2.6 
5 75.6 2.3 
6 74.9 2.3 
7 75.4 2.6 
8 76.2 4.1 
9 76.5 5.3 
10 76.7 6.4 
11 77.0 73 
Noon. 77.3 8.0 
1 77.3 8.2 
2 77.4 8.0 
3 77.6 8.2 
4 77.5 7.9 
5 77.2 6.7 
6 77.5 5.1 
7 77.2 4.3 
8 76.9 3.9 
9 76.8 3.4 
10 76.4 3.0 
11 76.6 2.9 
Computed Dew Point. 
° 
74.1 
74.1 
73.7 
72.8 
74.0 
73.3 
73.6 
73.3 
72.8 
72.2 
71.9 
len 
71.6 
71.8 
71.9 
72.0 
72.5 
73.9 
74.2 
74.2 
74.4 
74.1 
74.6 
Dry Bulb above Dew 
Point. 
Mean Elastic force 
of Vapour. 
| 
| 
Inches. 
0.835 
-830 
-830 
846 
795 
827 
-809 
817 
-809 
795 
781 
173 
768 
766 
771 
773 
776 
787 
824 
832 
832 
838 
.830 
843 
in a Cubic 
foot of air. 
Mean Weight of Va- 
pour 
Troy grs.|Troy grs. 
9.03 
.00 
00 
8.89 
64 
97 
SOE 
.86 
72 
59 
36 
28 
19 
16 
21 
24 
28 
44, 
85 
.96 
96 
9.04 
8.96 
9.11 
Additional Weight of 
required 
for complete satu- 
ration. 
Vapour 
1.44 
30 
25 
30 
ool 
complete 
being 
saturation 
unity. 
Mean degree of Hu- 
midity, 
All the Hygrometrical elements are computed by the Greenwich Constants. 
From the 1st January, 1863, the Greenwich New Factors haye been used 
for computing Dew-point. 
