F 2
Factor for converting the actual run of the Beckley Anemograph cups to velocities recorded by the Dines Pressure Tube Anemograph.
Factor (Dines ÷ Beckley).
3
Mouth.
Mean 1910-1921.
1922.
January,
February,
March,
April,
2'01
2'10
2'05
2.22
2'07
2.24
2'09
2.42
May, June,
July,
2'13
2.21
2.17
1.32
2°24
1.68
August,
2'20
1.24
September,
2'19
1.55
October,
2'12
1'44
November,
2'10
2'05
December,
2'01
1.16
Year,
2'11
1.81
Gap Rock Anemograph.-A leak developed in the float in the month of June. After several attempts to repair it the instrument was again brought to the Observatory. The alterations to the vane mentioned last year had the desired effect in increasing its sensibility, but with N and E winds, which are variable and gusty, it occasionally made a complete revolution and so carried the pen off the paper.
Thermometers.-All thermometers in use were compared with the Kew Standard in winter and summer.
Richard Thermograph.-This instrument worked satisfactorily during the year, though the base lines as laid down from the hourly eye observations of rotating thermometers still show irregularities, except on dull days with small range of temperature. This is due partly to thermograph lag.
III. METEOROLOGICAL OBSERVATIONS AT THE OBSERVATORY.
Automatic records of the temperature of the air and evaporation were obtained with a Richard dry and wet bulb thermograph, and of the direction and velocity of the wind with a Beckley and a Dines-Baxendell anemograph, modified as described in the report for 1912. The amount of rain is recorded automatically by a Nakamura pluviograph, the amount of sunshine by two Campbell-Stokes universal sunshine recorders, and the relative humidity of the air by a small Richard hair hygrograph. Eye observations of...