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Accomac, Accomack County, Virginia
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Article describes the rain gauge: a metal cylinder with funnel lid and glass collector for measuring rainfall in inches. Details various types, including those with buckets or graduated vessels, and an automatic recording device with float and pen on a revolving drum that resets after one inch.
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TO
MEASURE
RAIN
Consists of Small Metal Cylinder With Glass Vessel for Collecting the Water.
What does the weather man mean when he says: "The rainfall for Tuesday was 1.76 inches?" Rainfall is measured by means of a rain gauge. A rain gauge consists of a small metal cylinder, the lid of which is in the form of a funnel with a specified diameter. Inside the cylinder is a glass vessel for collecting the rain. The rim of the funnel is usually composed of brass, while the rest of the contrivance is of copper or japanned metal, which serves as a protection against rust.
Various types of rain gauges are in use at the present time. Some have a diameter of eight inches, and contain a metal bucket, from which the rain is measured; others are three inches smaller, and contain a glass vessel graduated in half-inches, from which the water is poured into another more finely graduated bottle.
In one invention the rain from an ordinary receiver passes to a cylinder fitted with a float. To the float is attached a lever, which raises and lowers a sliding pen. The latter works on a revolving drum similar to those used on the barograph, the instrument often seen in windows of opticians' shops.
When one inch of rain has been collected the cylinder empties itself, and readings begin again at zero.
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Story Details
Story Details
Explanation of rain gauge construction and operation, including types with metal cylinder and glass vessel, variations in size and measurement methods, and an invention with float and recording mechanism that resets after one inch.