RESULTS OF METEOROLOGICAL OBSERVATIONS deduced from Daily Registers kept at the Government Station, Christchurch, for April and May, 1870.

Latitude, 43 deg. 32 min. 16 sec. S. ; Longitude, 172 deg. 38 min. 59 sec. E.

Height above Sea, 21 feet; distance from Sea, 5 miles.

FOR APRIL.

Barometer (corrected and reduced to 32 deg., Fah.)—
Mean atmospheric pressure for month ... 29·972 inches
Highest pressure (on 28th) 30·423 ,,
Lowest pressure (on 24th) 28·974 ,,

Temperature in Shade—
Approx. mean temperature for month ... 50·9 Fah.
Mean of highest daily temperature ... 58·4 ,,
Mean of lowest daily temperature ... 43·5 ,,
Highest in month (on 8th) 76·5 ,,
Lowest in month (on 27th) 27·3 ,,
Mean daily range ... 14·8 ,,

Solar Radiation—
Mean ... 107·9 ,,
Highest in month (on 8th) 189·5 ,,

Terrestrial Radiation—
Mean ... 31·5 ,,
Lowest in month (on 27th) 11·7 ,,

Hygrometer, (deductions)—
Mean temperature of evaporation ... 48·6 ,,
Mean temperature of dew point ... 46·2 ,,
Mean tension of vapour ... 0·313 inches
Mean humidity (Saturation =100) ... 85

Rain—
Total rainfall on 14 days ... 3·194 inches
Greatest rainfall on one day registered at 9·30 a.m. for previous 24 hours (on 11th) 1·00 ,,

Wind—
Mean velocity in miles per day ... 144 miles
Greatest velocity in miles per day, registered at 9·30 a.m., for previous 24 hours (on 27th) ... 312 ,,

Cloud—
Mean amount at 9·30 a.m. (0=clear, 10=overcast) ... 5·7 ,,

Evaporation—
Total ... 3·414 inches
Number of days on which the wind blew from each point at 9·30 a.m.—
N. N.E. E. S.E. S. S.W. W. N.W. Calm.
0 3 8 1 2 13 0 3 0

FOR MAY.

Barometer (corrected and reduced to 32 deg., F.)—
Mean atmospheric pressure for month ... 29·899 inches
Highest pressure (on 5th) 30·331 ,,
Lowest pressure (on 15th) 29·350 ,,

Temperature in Shade—
Approx. mean temperature for month ... 46·8 Fah.
Mean of highest daily temperature ... 54·3 ,,
Mean of lowest daily temperature ... 39·4 ,,
Highest in month (on 15th) 66·8 ,,
Lowest in month (on 29th) 28·7 ,,
Mean daily range ... 14·9 ,,

Solar Radiation—
Mean ... 88·5 ,,
Highest in month (on 3rd) 112·7 ,,

Terrestrial Radiation—
Mean ... 27·4 ,,
Lowest in month (on 3rd) 14·9 ,,

Hygrometer, (deductions)—
Mean temperature of evaporation ... 45·2 ,,
Mean temperature of dew point ... 43·4 ,,
Mean tension of vapour ... 0·281 inches
Mean humidity (Saturation =100) ... 88

Rain—
Total rainfall on 10 days ... 4·049 inches
Greatest rainfall on one day registered at 9·30 a.m. for previous 24 hours (on 20th) 1·600 ,,

Wind—
Mean velocity in miles, per day ... 128 miles
Greatest velocity in miles, per day, registered at 9·30 a.m., for previous 24 hours (on 7th) ... 304 ,,

Cloud—
Mean amount at 9·30 a.m. (0=clear, 10=overcast) ... 5·8 ,,

Evaporation—
Total ... 2·309 inches
Number of days on which the wind blew from each point—at 9·30 a.m.
N. N.E. E. S.E. S. S.W. W. N.W. Calm.
0 2 6 5 1 15 1 0 1

REMARKS.

During the greater part of April, which is usually a fine month, dull and rainy weather was experienced. The weather during May was variable. The 19th, 20th, and 21st were very wet and stormy; the last ten days of the month were clear and fine. The rainfall in April was 1·388 inches, and in May 1·768 inches in excess of the average for the same months during the previous six years.

R. MAINWARING,
Observer, Christchurch.