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

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

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

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

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Max. height of the Barometer occurred at 9 & 10 A. M. on the 25th,

29.885

Min. height of the Barometer occurred at 4 P. M. on the 29th,
Extreme range of the Barometer during the month,

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Mean daily range of the Barometer during the month,

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29.640

0.145

Mean Dry Bulb Thermometer for the month,
Max. Temperature occurred at 2 P. M. on the 3rd,
Min. Temperature occurred at 6 A. M. on the 23rd,
Extreme range of the Temperature during the month,
Mean of the daily Max. Temperature,

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Ditto ditto Min. ditto,

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Mean daily range of the Temperature during the month,
Mean Wet Bulb Thermometer for the month,..

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

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Mean Dry Bulb Thermometer above computed Mean Dew-point,

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Mean Elastic force of Vapour for the month, ..

Inches 0.840

Troy grains

Mean Weight of Vapour for the month,

8.98

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

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

in the month of April, 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.

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

in the month of May, 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

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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.

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