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Abstract of the Results of the Hourly Meteoroloyical Observations

taken at the Surveyor GeneraZ’s Oflice, Calcutta,
in the month 0fAu_qust, 1861.

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Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor Goneral’s Ojice; Calcutta, in the month qfAuyust, 1861.

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Abstractof the Reanlts of the H0u1'ly Meteorological Observations taken at the Surveyor General’s Ofiice, Calcutta, in the month of August, 1861.

MONTHLY Resume. Inches Mean height of the Barometer for the month, .. L. 29.597 Max. height of the Barometer occurred at 9 A. M. on the 5th, . . 29.795 Min. height of the Barometer occurred at 4. P. M. on the 31st, .. 29.355

Extreme range of the Barometer during the month, . . . . 0.440 Mean of the daily Max. Pressures, ~ .. .. .. 29.653 Ditto ditto Min. ditto, . . .. . . 29.531 Mean daily range of the Barometer during the month, .. .. 0.122 0 Mean Dry Bulb Thermometer for the month, .'." .. 83.0 Max. Temperature occurred at 3 P- M. on the 6th, .. .. 91.8 Min. Temperature occurred at 1 1?. M. on the 9th, .. .. 76.0 Extreme range of the Temperature during the month, .. . . 15.8 Mean of the daily Max. Temperature, .. .. .. 88.2 Ditto ditto Min. ditto, . . . . . . 79.7 Mean daily range of the Temperature during the month, .. 8.5 0

Mean Wet Bulb Thermometer for the month, . J ;.“ 79.7 Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer,. . 3.3 Computed Mean Dew-point for the month, .. .. 78.0 Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 5.0 Inches

Mean Elastic force of Vapour for the month,.. .. , .. 0.910 - Troy grains.

Mean Weight of Vapour for the month, .. . .' .. 10.09 Additional Weight of Vapour required for complete saturation, .. 1.7 3 Mean degree of humidity for the month, complete saturation being unity, 0.85 Inches

Rained 26 days, Max. fall of rain during 24 hours, .. .. 2.58 Total amount of rain during the month, .. .. . . 16.12

Prevailing direction of the Wind, .. N 5. & E. & S. E.

Abstract of the Results of the 1Tourl_y Jlfeleorolaqical Observations taken at the »S’urve_y0r General’s Ofiee, Oaleutta,

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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,

Hour. N. Midnight. 1 2 3 4 5 1 6 1 7 1 8 2 9 10 11 Noon. 1 1 2 2 3 1 4 2 5 1 6 1 7 1 8 1 9 1 10 1. 1 1 1

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Abstract Qf the Results of the Hourly Meteorological Observations taken at the Surveyor General’s Ofiice, Calcutta, in the /month of September, 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 dependent thereon.

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4 .446 .487 .368 .119 82,6 87 .0 78.6 8.4

5 .484 .558 .435 .123 802 82.8 78.6 4.2

6 .568 .620 .513 .107 83.4 89.0 79.0 10.0

7 .609 .652 .556 .096 335 _ 88.2 80.2 8.0

8 Sunday.

9 .638 .688 .581 .107 84.7 90.0 81.2 8.8 10 .659 .722 .606 .116 84,7 89.8 81.2 8.6 11 .704 .770 .653 .117 85.1 89.8 81.7 8.1 12 .726 .790 .667 .123 33.7 87.2 80.2 7.0 13 .712 .772 .651 .121 84.4 88.8 79.6 9.2 14 .708 .770 .636 .134 84.0 89.2 79.7 9.5 15 Sunday.

16 .649 .695 .575 .120 33_7 89.0 81.2 7.8 17 .680 .730 ' .620 .110 84.5 91.8 79.4 12.4 18 .724 .782 -674 .108 83.2 85.4 81.6 3.8 19 .702 _757 .637 .120 82.8 89.4 80.6 8.8 20 .642 .698 .582 .116 80.9 83.2 79.6 3.6 21 .645 .715 -593 ' .122 81.9 85.6 78.6 7 .0 22 Szmday. ‘

23 .778 .836 .724 .112 83.6 88.4 79.2 9.2 24 .757 .826 .679 .147 85.3 91.2 80.6 10.6 25 .746 .790 .686 .104 84.7 90.0 81.2 8.8 26 .795 .854 .749 .105 84.3 90.1 80.2 9.9 27 .811 .879 "37 .142 85.5 91.6 80.6 11.0 28 .753 .810 .702 .108 82.3 89.2 78.8 10.4 29 Sunday. .

30 .673 .730 .597 .133 82.1 86.6 79.0 7.6

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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