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

in the month of August, 1861.

Hourly Means, &c. of the Observations and of the Hygrometrical elements dependent thereon.

The Mean height of the Barometer, as likewise the Mean Dry and Wet Bulb thermometers are derived from the Observations made at the several hours during the month.

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

in the month of August, 1861.

Hourly Means, &c. of the Observations and of the Hygrometrical elements dependent thereon.-(Continued.)

All the Hygrometrical elements are computed by the Greenwich Constants.

unity.

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

Scatd. i till 2 P. M. cloudy afterwards;
also raining between 3 & 9 P. M..
Cloudy, with drizzling between 6 & 8
A. M. & also at 3 P. M.

Cloudless till 5 A. M. Scatd. clouds till
7 P. M. cloudless afterwards; also
drizzling at Noon & 2 P. M.

Cloudless till 1 A. M. Scatd. clouds till
8 P. M. cloudless afterwards.
Scatd clouds.

Cloudy, with incessant drizzling be-
tween 2 A. M. & 1 P. M.

Cloudy; also drizzling at Midnight &
also between 9 A. M. & 1 P. M. & also
between 10 & 11 P. M,

Cloudy; also incessantly raining between
Midnight & 4 A. M.; also drizzling at
8 A. M. & 3 P. M. & 6 P. M.
Scatd. clouds till 7 P. M. cloudless af-
terwards.

Scatd. clouds, with slight drizzling at 8

P. M.

Cloudless till 6 A. M. Scatd. i till 11
A. M. Scatd. i afterwards; also rain-
ing at 1 P. M.
Cloudless till 6 A. M. Scatdi & ni
till 5 P. M. cloudless afterwards; also
slightly drizzling at 2 P. M.
Cloudless till 5 A. M. Scatd. i after-

wards; also slightly raining at 3 P. M. Scatd. clouds, with occasional drizzling. Cloudless till 6 A. M. Scatd. clouds afterwards, with occasional raining.

Scatd \i & i; also slightly drizzling at 4 P. M.

Cloudy, with incessant rain between 2
& 9 P. M.

Cloudy & constantly drizzling.
Cloudy, with constant rain.

Cloudy; also raining at 6 & 7 A. M. &
11 P. M.

Abstract of the Results of the Hourly Meteorological Observations

taken at the Surveyor General's Office, Calcutta,

\i Cirri, i Cirro strati, i Cumuli, i Cumulo strati, i Nimbi, -1 Strati, Cirro cumuli.

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

in the month of August, 1861.

MONTHLY RESULTS.

Mean height of the Barometer for the month,

Inches

29.597

Max. height of the Barometer occurred at 9 A. M. on the 5th,
Min. height of the Barometer occurred at 4 P. M. on the 31st,
Extreme range of the Barometer during the month,
Mean of the daily Max. Pressures,

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 6th,

Min. Temperature occurred at 1 P. M. on the 9th,
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,

3.3

78.0

Mean Dry Bulb Thermometer above computed Mean Dew-point,

10.09

1.73

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,