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Abstract of the Results of the Hourly Meteorological Observations ta/cen at the Surveyor General’s Ofice, Calcutta, in the month of./lpril, 1861.

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Abstract of the Results of the Hourly Il[ete0rol0_qical Observations taken at the Surveyor G-eneral’s Qfiice, Calcutta, in the month Qfzlpril, 1862.

MQNTHLY RESULTS.

Inches

Mean height of the Barometer for the month, . . . . . . 29.752 Max. height of the Barometer occurred at 9 A. M. on the 12th, .. 29.959 Min. height of the Barometer occurred at 6 P. M. on the 26th, .. 29.536 Extreme range of the Barometer during the month, . . . . 0.423 Mean of the Daily Max. Pressures, . .. .. .. 29.827 Ditto ditto Min. ditto, . . . . .. .. 29.673 Mean daily range of the Barometer during the month, .. .. 0.154.

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Mean Dry Bulb Thermometer for the month, . . .. .. 84.6 Max. Temperature occurred at 3 & 4. P. M. on the 145th, .. .. 100.2 Min. Temperature occurred at 8 P. M. on the 29th, .. .. 70.7 Extreme range of the Temperature during the month, . . ' .. 29.5 Mean of the daily Max. Temperature, .. .. .. 93.7 Ditto ditto Min. ditto, .. .. .. .. 76.8 Mean daily range of the Temperature during the month, .. ' .. 16.9 Mean \Vet Bulb Thermometer for the month, .. .. -. 76.9 Mean Dry Bulb Thermometer above Mean Wet Bulb Thermometer, .. 7.7 Computed Mean Dew-point for the month, .. .. .. 73.0

Mean Dry Bulb Thermometer above computed Mean Dew-point, ,. 11_.6

_ Inches Mean Elastic force of Vapour for the month, .. .. .. 0.801

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Troy grains Mean Weiglit of Vapour for the month, .. .. .. 8.55

Additional Weight of Vapour required for complete saturation, . . 3.84. Mean degree of humidity for the month, complete saturation being unity, 0.69

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Inches Ruined 8 days, Max. fall of rain during 241 hours, .. .. 0.68 Total amount ofrain during the month, . . .. .- 2.53

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

dbstract of the Results of the Hourly Meteorological Observations taken at the Su-rveyor G-eneral’s Qfiice, Calcutta, in the month qfApril, 1862.

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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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Abstract of the Results of the Hourly llfeteoroloyical Obse-rvatious
taken at the Sm-ve_yor General’s Qflice, Calcutta,

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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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The Mean height of the Barometer, as likevtise the Mean Dry and Wet Bulb
Thermometers, are derived from the twenty-four hourly Observations made during
the day.

Abstract Q/" the Results of the Hourly Meteorological Observatiom
taken at 1710 Su1‘w_1/or General’s Ojice, Calcutta,

in the month qfflfay, 1862.
Daily Means, &c. of the Observations and of the Hygrometrical elements
dependent thereon.—(C0nfinued.)

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2 78.4 6.3 75.2 9 5 .360 9.18 3.24 .74

3 77.6 5.5 74.8 8 3 .849 .11 2.75 .77

4 Sunday.

5 78.3 5.1 75.7 7.7 .873 .36 .60 .78

6 73.3 3.7 71.4 . 5.6 .761 8.25 1.64 .83

7 76.8 5.4 74.1 8.1 .830 .92 2.62 .77

B 75.3 6.5 72.0 9.8 -776 .33 3.07 -73

9 78.2 6.8 74.8 10.2 .84-9 " 9.07 .46 .72
10 78.4 6.1 75.3 9.2 .862 .23 .12 .75
11 Sunday.
12 76.4 6.9 72.9 10.4 .797 8.56 .37 .72
13 79.1 7.0 75.6 10.5 .871 9.27 .68 -72
14 79.7 6.3 76.5 9.5 .896 .56 .35 -74:
'15 77.6 5.2 75.0 7.8 .854 .16 2.59 .78
16 79.6 6.4 76.4 9.6 .893 .53 3.38 .74
17 79.8 6.8 76.4 I 10.2 .893 .53 .61 .73
18 Sunday.
19 79.4 6.6 76.1 9.9 .885 .44 .47 .73
20 77.6 5.6 74.8 8.4 .849 .11 2.78 .77
21 76.2 6.2 73.1 9.3 .803 8.63 .98 .74
22 79.3 6.5 76.0 9.8 .882 9.41 3.42 .73
23 81.4 0.3 78.2 9.5 .946 10.05 .51 .741
24 81.4 6.0 78.4 9.0 .952 .12 .33 .75
25 Sumla;/.
26 80.6 7.2 77.0 10.8 .910 9.67 .93 .71
27 81.1 8.4 76.9 12.6 .908 .60 4.69 .67
28 82.5 9.0 78.0 13.5 .940 .90 5.25 .65
29 ‘ 83.4 8.2 79.3 12.3 .979 10.34 4.85 .68
30 83.0 7.1 79.4 10.7 .983 .39 .15 .72
31 83.7 6.5 80.4 9.8 1.014 .72 8.87 .74

All the Hygrometricnl elements are computed by the Greenwich Constants.

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