Sunshine recorder

Sunshine recorder

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Credit: DR. JOHN BRACKENBURY/SCIENCE PHOTO LIBRARY

Caption: Sunshine recorder. This mechanical device is used to measure how many hours of sunshine there are in a day. The glass globe acts as a lens, focusing sunlight onto a moving strip of recording paper. This produces a burn length that is proportional to the period of sunshine.

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Keywords: astronomical, astronomy, burn, burning, climate, device, duration, equipment, focusing, glass ball, glass globe, historical, history, history of science, hours, instrument, lens, light, measure, measuring, mechanical, meteorological, meteorology, record, recording, sun, sunlight, sunshine recorder, time, weather

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