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

in the month of December, 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.

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.

Date.

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

in the month of December, 1861.

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

Sunday.

60.6

62.5

7.1

.568

6.26

.64

.79

64.3

6.2

.603

.64

.49

.82

65.8

4.8

.634

.97

.18

.86

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 Office, Calcutta,

in the month of December, 1861.

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

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

Hour.

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

in the month of December, 1861.

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

Mid

night.

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 Office, Calcutta,

N. & N. W.

Cloudless till 11 A. M. Scatd. \i & i till 4 P. M. cloudless afterwards. Cloudless till 8 A. M. Scatd. \i & Li till 5 P. M. cloudless afterwards. Cloudless; also foggy after 8 P. M. Cloudless.

Cloudless.

N. & N. E. & N. W. Cloudless; also foggy after 7 P. M.

N. E. & S.

S. E. & E.

S. & W. & N.

Cloudless.

Scatd. i.

Scatd. clouds; also slightly raining at

9 A. M.

N. & N. W. & N. E. Scatd. i till 3 A. M. cloudless after

N.

14

133.0

15 Sunday.

16

::ལྦ

N.

0.26 S. & N.

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

W. & N. W.

wards. Cloudless.

Cloudless.

Cloudless till 4 P. M. cloudy till 5 P. M. cloudless afterwards; also raining be

tween 11 A. M. & Noon.

Scatd. i till 4 A. M. cloudy till 10
A. M. Scatd. i till 5 P. M. cloudless
afterwards; also foggy after 8 P. M.
Cloudless.

Cloudless.

Cloudless.

N. W. & N. & N. E. Cloudless; also foggy till 4 A. M.

Cloudless.

W. & N. W.

\i Cirri, i Cirro strati, i Cumuli, i Cumulo strati, i Nimbi, i Strati, i Cirro cumuli.