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Abstract of the Results of the Hourly M'eteorolo_qical Observations taken at the Survey/or General’s Qfiice, Calcutta, in the month of December, 1861.

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

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The Mean height of the Barometer, as likewise the Mean Dry and Wet Bull) Thermometers, are derived from the Observations made at the several hours during the month.

Abstract of 1710 Results of the Hourly Meteorological Observations taken at the »S’urve_z/01' General’s Qfiice, Calcutta, in the month of December, 1861.

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

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All the ll_)g1-omemcel elements are computed by the Greenwich 0011515515.

Abstract of the Results of the Ilourly Jl[eteorolo_qz'cal Observations taken at the Surveyor General’s Ofiioe, Calcutta, in the month of December, 1861.

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28' 134.. 0 ... N. E. & E. Cloudless.

29 Sunday.

30 134.5 ... N. & N. E. Cloudless.

31 135.0 ... N. Cloudless till 6 A. M. Scatd \i 8.’. \-i

till 4 2. M. cloudless afterwards.

\i_ Oirri, \-i Cirro strati, oi Cumuli, Ni Cumnlo strati, \/\-i Nimbi, -—i Strati, “-1 O1l‘1'0 cumull.

Abstract of the Results of the Hourlg Meteorological Observations taken at the Surveyor General’s Ofiee, Oaleatta, in the month of December, 1861.

MONTHLY Rnsuws.

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Inches

Mean height of the Barometer for the month, . . 30.008 Max. height of the Barometer occurred at 10 A. M. on the 6th, 30.164 Min. height of the Barometer occurred at 41 P. M. on the 16th, 29.850 Extreme range of the Barometer during the month, .. 0.314.~ Mean of the Daily Max. Pressures, 30.077 Ditto ditto Min. ditto, .. .. 29.955 Mean daily range of the Barometer during the month, 0.122

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Mean Dry Bulb Thermometer for the month, 66.5 Max. Temperature occurred at 2 P. M. on the 9th, 79.4: Min. Temperature occurred at 6 A. M. on the 27th, 56.8 Extreme range of the Temperature during the month, 22.6 Mean of the daily Max. Temperature, .. 74.5 Ditto ditto M in. ditto, . . 60.2 Mean daily range of the Temperature during the month, 14.3 Mean Wet Bulb Thermometer for the month,. . . . 61.7 Mean Dry Bulb Thermometer above Mean VVet Bulb Thermometer, 4.8 Computed l\Iean Dew-point for the month, .. .. 58.8 Mean Dry Bulb Thermometer above computed Mean Dew-point, 7.7 Inches

Mean Elastic force of Vapour for the month, 0.503 Troy grains

Mean Weight of Vapour for the month, 5.56 Additional Weight of Vapour required for complete saturation, 1.63 Mean degree of humidity for the month, complete saturation being unity, 0.77 Inches

Rained 2 days, Max. fall of rain during 24. hours, 0.26 Total amount of rain during the month, 0.26 Prevailing direction of the Wind, . . IN. & W.

Abstract of the Results of tlze Hourly Meteorological Observations taken at the Surveyor General’s Qfiice, Calcutta, in the month of Decemlmg 1861.

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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, when any particular wind was blowing, it rained.

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