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

in the month of October, 1861.

MONTHLY RESULTS.

Inches

Mean height of the Barometer for the month,

29.802

Max. height of the Barometer occurred at 9 A. M. on the 22nd,

30.049

Min. height of the Barometer occurred at 5 P. M. on the 5th,

29.523

Mean daily range of the Barometer during the month,

29.746

Mean Dry Bulb Thermometer for the month,
Max. Temperature occurred at 2 P. M. on the 4th,
Min. Temperature occurred at 6 A. M. on the 26th,
Extreme range of the Temperature during the month,

81.2

90.0

73.0

17.0

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,

3.9

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 October, 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 November, 1861.

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 November, 1861.

Daily 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,

in the month of November, 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.