Publisher's Synopsis
Excerpt from Instructions for Using Marvin's Weighing Rain and Snow Gauge
A single stroke of the magnet moves the sliding weight only one eight-hundredth part of an inch and represents one one-thousandth inch rainfall; that is, about $0 of an ounce, or gram; The record pen for one stroke of the magnet moves one one-hundred and fiftieth part of an inch; the scale of precipitation, therefore, is magnified 6% times. The pen will pass once across the sheet for each one-half inch of precipitation, and the sheet is subdivided to represent hundredths of inches of precipitation. The cylinder is 12 inches in circumfer ence and revolves twice in twenty-four hours. The sheet is subdivi ded into ten-minute spaces, and intervals of one minute of time can be determined.
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