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

in the month of February, 1858.

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

All the Hygrometrical elements are computed by the Greenwich constants.

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

N. W. & N. E.

8 128.7

9 131.0

Cloudless.

Cloudless.

Cloudless till 7 A. M. Scatd. i till 5
P. M. cloudless afterwards.

Cloudy till 7 A. M. Scatd. -i and \i till 4 P. M. cloudless afterwards. Cloudless.

Cloudless.

Cloudless till 4 A. M. Scatd. i till 10 A. M. cloudy afterwards. Also slightly drizzling between 2 and 5 P. M. N. & N. E. & S. E. Cloudy also raining between Midnight

and 1 A. M.

[8 A. M.

Cloudless: also foggy between 6 and

N. W. & N. & W.

N. W. & Calm.

Cloudless.

::::

137.0

28 Sunday.

i.

i till 1 A. M. cloudless till 6 A. M. Scatd. i till 3 P. M. cloudy afterwards. Also very slightly drizzling between 8 and 11 P. M.

Scatd. clouds till 8 A. M. cloudless
afterwards.

Cloudless till 11 A. M. Scatd. i till 6
P. M. cloudless afterwards.

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

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

30.142

29.821

0.321

30.060

29.914

Max. height of the Barometer occurred at 10 A. M. on the 8th,
Min. height of the Barometer occurred at 4 & 5 P. M. on the 27th, .
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 25th,

Min. Temperature occurred at 7 A. 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,

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

Mean Dry Bulb Thermometer above computed mean Dew-point,

2.70

0.67

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 February, 1858.

MONTHLY RESULTS.

hour when

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 any particular wind was blowing it rained.