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Easy Method Of Making A Rain Gauge

A very simple rain gauge, and one which will answer all practical

purposes, consists of a copper funnel the area of whose opening is

exactly ten square inches: this funnel is fixed in a bottle, and the

quantity of rain caught is ascertained by multiplying the weight in

ounces by 173, which gives the depth in inches and parts of an inch.

In fixing these gauges, care must be taken that the rain may have free

access to them: hence the tops of buildings are usually the best

places. When the quantities of rain collected in them at different

places are compared, the instruments ought to be fixed at the same

heights above the ground at both places, because at different heights

the quantities are always different, even at the same place.