How can they measure the amount of rainfall?
There are thousands of weather stations spotted across our land where weather watchers measure such events as temperature and pressure, wind and rain. News from the local points is flashed to a central Weather Bureau to be analyzed. Then the weatherman can tell exactly how much rainfall was doused upon our town by yesterday’s shower. Suppose the weatherman reported that more than 32. million tons of water had been dropped upon the city of Los Angeles. This, surely, would be a deluge and We would expect to find the city knee deep in floods. Not at ail it is merely the weight of one inch of rainfall on the entire area of the city. Most of this water, of course, would drain away or sink into the soil, leaving wet streets and a few puddles to dry up in the sunshine. Normally the amount of rainfall is measured in inches and fractions of an inch. An inch of rainfall would cover a solid, level area with a layer of water one inch deep. However, as they fall, most of the raindrops drain away do
