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

in the month of March, 1858.
MONTHLY RESULTS.

Mean height of the Barometer for the month,

Inches.

29.849

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Max. height of the Barometer, occurred at 9 A. M. on the 20th,
Min. height of the Barometer, occurred at 5 P. M. on the 30th,
Extreme Range of the Barometer during the month,
Mean of the Daily Max. Pressures,

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Mean Daily range of the Barometer during the month,

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17.9

Max. Temperature, occurred at 3 P. M. on the 18th,
Min. Temperature, occurred at 6 & 7 A. M. on the 5th,
Extreme Range of the Temperature during the month,
Mean of the Daily Max. Temperature,

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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,

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Mean Dry Bulb Thermometer above computed Mean Dew Point,

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7.42

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3.82

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0.66

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,

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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 March, 1858.

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 April, 1858.

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.

Date.

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

in the month of April, 1858.

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

(Continued.)

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77.1

7.5

73.3

11.3

0.809

8.65

3.74

0.70

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11

Sunday.

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All the Hygrometrical elements are computed by the Greenwich constants.

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