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

in the month of December, 1861.

MONTHLY RESULTS.

Inches

Mean height of the Barometer for the month,

30.008

Max. height of the Barometer occurred at 10 A. M. on the 6th,

30.164

Min. height of the Barometer occurred at 4 P. M. on the 16th,
Extreme range of the Barometer during the month,
Mean of the Daily Max. Pressures,

29.850

0.314

30.077

Ditto ditto Min. ditto,

29.955

Mean daily range of the Barometer during the month,

Mean daily range of the Temperature during the month,

14.3

Mean Wet Bulb Thermometer for the month,..

61.7

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

4.8

Mean Dry Bulb Thermometer above computed Mean Dew-point,

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 December, 1861.

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 January, 1862.

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

The Mean height of the Barometer, as likewise the Mean Dry and Wet Bulb Thermometers are derived from the twenty-four hourly Observations made during the day.

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

in the month of January, 1862.

Daily Means, &c. of the Observations and of the Hygrometrical elements

All the Hygrometrical elements are computed by the Greenwich Constants.