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

Max. height of the Barometer occurred at 10 A. M. on the 23rd,
Min. height of the Barometer occurred at 4 P. M. on the 5th,
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 3rd,
Min. Temperature occurred at 6 A. M. on the 30th,
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,

Troy grains

6.61

2.76

0.71

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 November, 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 December, 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

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

Date.

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

in the month of December, 1863.

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

123456

61.0

6.5

55.8 11.7

0.455

All the Hygrometrical elements are computed by the Greenwich Constants. From the 1st January, 1863, the Greenwich New Factors have been used for computing Dew-points.