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British Rainfall 1912, p.57
depth in the earth it is hoped that the changes of
temperature in the receiver will be greatly retarded.
Experience will show whether the means employed are
sufficient to attain the end in view.
The third difficulty, which is the most apparent to the
observers of mountain gauges, is the correct measurement of
the water collected. The principle of the "Bradford" gauge,
with a modification, has
been adopted. A rod, graduated to represent inches of rain
for a five-inch funnel, is first inserted into the
receiver,and the depth to which it is wet is noted. On
account of the difference of area between the funnel and the
receiver, one inch of rain corresponds to between one-half
and one-third of an inch of rain in the gauge. To obviate
the laborious process of emptying the gauge and measuring
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