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Hour.

XX

Meteorological Observations.

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

in the month of March 1866.

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

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Midnight.

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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 Office, Calcutta,

in the month of March 1866.

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

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

S. W. & W.

13 137.0

14 140.0

S. & W.

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S. & N.

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

Clear. Scuds from S.between 4 &7A.M.
Clear to 4 A. M., scatd. i to 9 A. M.,
clear afterwards.

Clear, slightly foggy from 4 to 6 A. M.
Clear, slightly foggy from 3 to 8 A. M.
Clear, slightly foggy at 4 A. M.

Clear.

Clear to 2 A. M., overcast to 6 A. M.,
clear afterwards.

Clear, slightly foggy at 1 A. M.
Clear, slightly foggy from 3 to 5 A. M.
Scatd. clouds to 8 A. M., clear after-
wards.

Clear to 7 A. M. i to 7 P. M., clear
afterwards.

\i to 8 P. M., clear afterwards.
\i to 8 A. M., clear afterwards.
Clear, foggy from 4 to 7 A. M.

Clear to 1 P. M., scatd. \i to 6 P. M.,
clear afterwards.

Scatd. i to 9 A. M., clear afterwards.
Clouds of different kinds.

21 142.0

22 142.0

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23 146.0

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24 140.5

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25 141.0

S. & S. W.

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Clear.

Clear to 6 A. M., scatd. i to 5 P. M., overcast afterwards. Thin rain Lightning. and Thunder at 10 & 11 P. M. Overcast to 6 A. M., scatd. i to 8 P. M. over cast afterwards Thin rain at 11 P. M.

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,

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Meteorological Observations.

xxiii

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

month of March 1866.

MONTHLY RESULTS.

Mean height of the Barometer for the month,...

Max. height of the Barometer occurred at 10 A. M. on the 12th,
Min. height of the Barometer occurred at 5 P. M. on the 22nd,
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,

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Mean Dry Bulb Thermometer for the month,

83.9

Max. Temperature occurred at 4 P. M. on the 22nd,
Min. Temperature occurred at 7 A. M. on the 6th,

98.6

71.4

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

27.2

94.3

76.1

...

Mean daily range of the Temperature during the month,...

18.2

Mean Wet Bulb Thermometer for the month,

75.1

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.

8.8

68.9

...

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Mean Weight of Vapour for the month
Additional Weight of Vapour required for complete saturation, 4.62
Mean degree of humidity for the month, complete saturation being unity 0.62

Drizzled 2 days,-Max. fall of rain during 24 hours
Total amount of rain during the month,

Prevailing direction of the Wind,

Inches.

Nil

Nil

S. & W. & S. W.

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

in the month of March 1866.

MONTHLY RESULTS.

Tables shewing 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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