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Abstract of the Results of the Hou7'l_y Meteorological Observations taken at the S'urve_yor GeneraZ’.s Ojice, Calcutta, in the month of July, 1861.

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

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The Mean height of the Barometer, as likewisetho Mean Dry and VVet B1115 '1‘he_x-mcmeters are derived from the Observations made at the several hours dunng the month.

Abstract of the Results of the Houo-I_y ll1eteorolo_qical Olzservations taken at the Survey/07' General’s Ojice, Calouita, in file month ofJul_1/, 1861.

Hourly Means, &c. of the Observations and of the Hygrometrical elements dependent thereon.—(Con£inued.)

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All the Hygrometrical elements are computed by the Greenwich Constants.

Abstract of the "Results of the Hourly Meteorological Observations taken at the Surveyor General’-s Ofiice, Calcutta, in the month Q/'July, 1861.

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0 Max. Solar radiation.

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Sunday.

129.4. 122.2

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118.5

136.0

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Sunday.
Sunday.

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Rain Gauge
5 feet above
Ground.

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Inches.
0.54

0.33
2.40
0.12

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Cloudy; also slightly drizzling at 1 81
11 A. M.

Cloudy ; also slightly drizzling at 6
P. M.

Abstract of the Results of the Hourly Meteorological Observations taken at the Surveyor General’s Ojice, Calcutta,

in the month ofJu.ly, 1861.
Solar Radiation, Weather, &c.

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' Q) Q E 8 5-.“ B . Q L: Q ‘Q '_U 4 n 1 1 . m .35 E g Prevailing direction General Aspect of the Sky. 2 >3 =1 .5 3:’ ° of the Wind. 6: ,5 ;.. 331.4 2-. Q 2 1: -Q 1° 26 S- Cloudy; also occasionally drizzling. 27 S.& S. W. Scatcl. \—i till 8A. M. Scatd. clouds afterwards. 28 Sunday. 0.90 29 0.17 S. W. & S. Cloudy, with rain at 7 ‘P. M. 30 0.26 S. \V. & W. & S. Cloudy, with constant drizzling be. tween 5 & 9 I’. M.

31 _,, ... S. W. 80 S. & YV. Cloudy.

\i Cirri, \-i Cirro strati, oi Cumuli,

\v\ i Cirro cumuli.

P-i Cumulo strati, \'\-i Niinbi, -i Stmti

Abstract of the Results of the Hourly Meteorological Observations

taken at the Surveyor General’s Ofiice, Calcutta,
in the month of July, 1861.

Mo1~Ir11LY RESULTS. Inches Mean height of the Barometer for the month, . . . . 29.534. Max. height of the Barometer occurred at 10 A. M. on the 13th, . . 29.678 Min. height of the Barometer occurred at 5 P. M. on the 17th, .. 29.259

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Extreme range of the Barometer during the month, . . . . 0.419 Mean of the daily Max. Pressures, .. . . . . 29.586 Ditto ditto Min. ditto, .. .. . . 29.4/74: Mean daily range of the Barometer during the month, . . . . 0.112 0 Mean Dry Bulb Thermometer for the month, .. .. 83.1 Max. Temperature occurred at 3 P- M. on the 8th and 11th, .. 91.6 Min. Temperature occurred at 7 2. M. on the 30th, .. .. 78.4: Extreme range of the Temperature during the month, .. .. 13 2 Mean of the daily Max. Temperature, .. .. .. 87.3 Ditto ditto Min. ditto, .. .. . .. 80.2 Mean daily range of the Temperature during the month, .. 7.1 0

Mean Wet Bulb Thermometer for the month, .. .. 79.8 Mean Dry Bulb Thermometer above Mean Wet Bulb Therm0meter,.. 33 Computed Mean Dew-point for the month, . . . . 78.1 Mean Dry Bulb Thermometer above computed Mean Dew-point, .. 5.0 Inches

Mean Elastic force of Vapour for the month,. . .. . . 0.943

Troy grains. Mean Weiglit of Vapour for the month, .. .. .. 10.12 Additional \Veight of Vapour required for complete saturation, . . 1.74

Mean degree of humidity for the month, complete saturation being unity, 0.85

Inches Rained 26 days, Max. fall of rain during 24. hours, .. . . 2.40 Total amount of rain during the month, .. .. .. 10.93

Prevailing direction of the Wind, .. .. S. & E. & S. W.

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