AnnualReport-1931

Miles.

F 3

Scale value of Dines Anemograph.

1927

Millimetres on sheet.

1931

Miles. 1927 1931 1 0.8 0.6 2 1.3 1.3 3 2.4 2.1 4 3.4 3.1 5 4.5 4.3 6 5.6 5.6 7 6.8 7.0 8 8.1 8.5 9 9.5 ... 10 11.0 11.8 20 26.1 26.8 40 56.2 56.8 63 86.4 86.9 80 116.5 116.9 100 146.6 147.0 120 176.7 177.0

In determining the scale value for velocity up to 10 m.p.h. the U tube was tilted about 80° from the vertical, to obtain sufficient change in the water level for a given velocity.

The mean monthly results of comparisons with the records of the Beckley Anemograph from 1910-1930 are given in the following table, together with the results for 1931: