xxxviii

Meteorological Observations.

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

3.00

Clear to 7 A. M., scatd. i to 6

P. M., clear afterwards.
Clear to 6 A. M., scatdi to 6p. M.

Overcast afterwards. Rain be-
tween 7 & 8 P. M.

S. S.W. & S.W. & S. 0.70 Clear to 11 A. M., scatd ^i to 2

P. M., clear afterwards.

0.50 Clear.

0.30 Scatd.\i to 4 A. M., clear after

20 130.0 21 130.2

S. S. W. & S.

S. & S. S. W.

i Cirri, i Strati,~i Cumuli,i Cirro-strati, ~i Cumulo strati,i Nimbi, i Cirro cumuli.

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

29.708 29.571 0.137

Max. height of the Barometer occurred at 9 A. M. on the 1st,
Min. height of the Barometer occurred at 5 P. M. on the 29th,
Extreme range of the Barometer during the month,
Mean of the daily Max. Pressures,

Ditto ditto Min.

ditto

Mean daily range of the Barometer during the month,

Max. Temperature occurred at 3 P. M. on the 27th

105.8

Min. Temperature occurred at 5 A. M. on the 3rd ...

71.7

Extreme range of the Temperature during the month,
Mean of the daily Max. Temperature...
Ditto ditto Min. ditto,

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,

Mean Dry Bulb Thermometer above computed mean Dew-point.

Mean Elastic force of Vapour for the month,

80.7

6.3

76.9

10.1

Inches.

0.908

...

Troy grains.

9.66

Mean Weight of Vapour for the month
Additional Weight of Vapour required for complete saturation, 3.63
Mean degree of humidity for the month, complete saturation being unity 0.73

Inches.

Rained 9 days,-Max. fall of rain during 24 hours

Total amount of rain during the month,

Total amount of rain indicated by the Gauge attached to the anemo

1.85

S. & S. S. W. & S. S. E.

which at the same hour, when any particular wind was blowing, it rained.

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

in the month of June 1866.

Latitude 22° 33′ 1′′ North. Longitude 88° 20′ 34′′ East.

Height of the Cistern of the Standard Barometer above the sea level, 18-11 feet.

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

The Mean Height of the Barometer, as likewise the Dry and Wet Bulb Thermometer Means are derived, from the hourly observations, made during the day.

Abstract of the Results of the Hourly Meteorological Observations

taken at the Surveyor General's Office, Calcutta,

in the month of June 1866.

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

All the Hygrometrical elements are computed by the Greenwich Constants.