Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta,

1.90 W. & S. W.

Cloudy; also drizzling from 4 to 8 P. M.; and also at 11 P. M.

Cloudy; also incessantly raining from 1 A. M. to Noon.

Cloudy also slightly drizzling between 8 & 10 A. M. and at 3 & 4 P. M. Cloudy till 7 P. M. cloudless afterwards; also raining from 1 to 3 A. M. and between 10 and 11 A. M.

Cloudless till 5 A. M.; cloudy till 6 P. M. cloudless afterwards; also drizzling occasionally from 6 A. M. to 1 P. M. 1 Cloudless till 4 A. M. cloudy afterwards; also slightly drizzling at 8 A. M. Noon, and 9 P. M.

1 Cloudy till 10 A. M. Scatd. ^i till 7 P. M.; cloudless afterwards.

1

3

0.17 E. & S. E.

23

Cloudy; also very slightly drizzling after intervals.

Cloudless till 6 A. M. cloudy afterwards; and thundering at 2 P. M.; also drizzling at Noon & between 1 & 2 P. M. 3 Cloudy; and thundering at 1 P. M.; also raining between 10 & 11 a. M. ; & at 1 & 5 P. M.

2 Cloudless till 5 A. M.; cloudy till 4 P. M. cloudless afterwards; & thundering at Noon, also raining between 10 & 11 A. M. and at 3 & 4 P. M.

13 Cloudless till 6 A. M. Scatd.

i till 11

A. M. Scatd. clouds till 8 P. M. cloudless afterwards; also thundering at Noon.

Cloudless till 5 A. M. Scatd. ^i till 7 P. M. cloudless afterwards; also drizzling between 3 & 4 A. M. & 11 & Noon & 5 & 6 P. M.

Cloudy; also raining after intervals. Cloudy till 8 P. M.; cloudless afterwards; also incessantly raining from 1 A. M. to Noon.

Abstract of the Results of the Hourly Meteorological Observations

taken at the Surveyor General's Office, Calcutta,

in the month of August, 1863.

23 Cloudless till 3 A. M. cloudy till 7 P. M.; cloudless afterwards, also raining at 4, 5, 7, 9, & 11 A. M.

44 Cloudless till 5 A. M. Scatd. -i & i till
1 P. M. cloudy afterwards; with thun-
der at 6 P. M. also slightly drizzling
at 7 P. M.

1 Cloudy; with thunder & lightning at
Midnight; also drizzling at 1 A. M.
and from 9 P. M. to 11 P M.
34 Cloudy; also constantly drizzling and
raining.

Cloudy; also raining from 2 P. M. to

4 P. M.

14

0.24 S. E. & Calm.

3

...

0.41
0.12

S. E. & S.

2

S. & S. E.

14

Cloudy; also raining from 5 to 10 A. M.
Cloudy, also drizzling between 5 & 6
A. M. at 9 & 10 A. M. & between 2 &
3 P. M.

hi Cirro cumuli.

4 Scatd. i till 8 A. M. cloudy till 7 P. M.
Scatd. i afterwards; also drizzling
from 11 A. M. to 3 P. M.
Scatd. clouds.

Scatd. i till 7 A. M. cloudy till 7 P. M.
cloudless afterwards; also raining
between 10 & 11 A. M. at 1, 3 & 4 P. M.

Cloudy, also drizzling at 7 A. M. and from 1 to 3 P. M.

Ni Cirri, i Cirro strati, i Cumuli, i Cumulo strati, i Nimbi, -i Strati,

Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta,

in the month of August, 1863.

MONTHLY RESULTS.

Mean height of the Barometer for the month,

Max. height of the Barometer occurred at 10 A. M. on the 27th,
Min. height of the Barometer occurred at 5 A. M. on the 17th,
Extreme range of the Barometer during the month,
Mean of the daily Max. Pressures,

Ditto ditto Min. ditto,

Mean daily range of the Barometer during the month, .

Mean Dry Bulb Thermometer for the month,
Max. Temperature occurred at 3 P. M. on the 15th,
Min. Temperature occurred at 5 A. M. on the 25th,
Extreme range of the Temperature during the month,
Mean of the daily Max. Temperature,

Mean daily range of the Temperature during the month,

::

Mean Wet Bulb Thermometer for the month,

79.7

Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer,..
Computed Mean Dew-point for the month,

3.1

77.5

Mean Dry Bulb Thermometer above computed Mean Dew-point,

Mean Elastic force of Vapour for the month,..

Troy grains

9.94

1.81

0.85

Mean Weight of Vapour for the month,

Additional Weight of Vapour required for complete saturation,
Mean degree of humidity for the month, complete saturation being unity,

Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta,

in the month of August, 1863.

MONTHLY RESULTS.

Table showing the number of days on which at a given hour any particular wind blew, together with the number of days on which at the same hour, when any particular wind was blowing, it rained.

Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General's Office, Calcutta,

in the month of September, 1863.

Latitude 22° 33′ 1′′ North. Longitude 88° 20′ 34′′ East.

Feet.

Height of the Cistern of the Standard Barometer above the Sea-level, 18.11 Daily Means, &c. of the Observations and of the Hygrometrical elements dependent thereon.

The Mean Height of the Barometer, as likewise the Dry and Wet Bulb Thermometer Means are derived from the hourly Observations made during the day.