THE SILVER DISC PYRHELIOMETER. —The most sensitive thermometer ever made, used to measure the heat of the stars and chart the variation of the sun's heat from day to day. This is done on a basis of long-range weather forecasting. The thermometer can be "throttled down" to measure one-millionth part of a degree of temperature. It is capable, for instance, of measuring the heat cast off by a match at a distance of ten miles or more. A candle lighted 50 miles away would register its heat on the pyrheliometer if the delicate telescope shown were to get the candle in its line of vision.
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Bibliographic details
Sun (Auckland), Volume IV, Issue 1010, 28 June 1930, Page 17
Word Count
105THE SILVER DISC PYRHELIOMETER.—The most sensitive thermometer ever made, used to measure the heat of the stars and chart the variation of the sun's heat from day to day. This is done on a basis of long-range weather forecasting. The thermometer can be "throttled down" to measure one-millionth part of a degree of temperature. It is capable, for instance, of measuring the heat cast off by a match at a distance of ten miles or more. A candle lighted 50 miles away would register its heat on the pyrheliometer if the delicate telescope shown were to get the candle in its line of vision. Sun (Auckland), Volume IV, Issue 1010, 28 June 1930, Page 17
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