Abstract of the Results of the Hourly Meteorological Observations

taken at the Surveyor General's Office, Calcutta,

in the month of February, 1864.

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 5th,
Min. height of the Barometer occurred at 4 P. M. on the 17th,
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 13th,
Min. Temperature occurred at 6 & 7 A. M. on the 19th,
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,
Mean Elastic force of Vapour for the month,

Mean Weight of Vapour for the month,

2.89

0.67

Additional Weight of Vapour required for complete saturation,
Mean degree of humidity for the month, complete saturation being unity,

..

0.35

S. & W.

Total amount of rain indicated by the gauge attached to the Anemo-
meter during the month,
Prevailing direction of the Wind, ..

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

in the month of February, 1864.

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 March, 1864.

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 dependent thereon.

The Mean Height of the Barometer, as likewise the Dry and Wet Bulb Thermometer Means are derived from the hourly Observations made 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 March, 1864.

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

123456

66.5

10.7

59.0

0 55

All the Hygrometrical elements are computed by the Greenwich Constants.