Temperature of the Sun’s Rays.— The direct solar radiation is measured by a thermometer enclosed in a vacuum. The bulb of this thermometer is coated with lamp black to facilitate the absorption of the heat.
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Dominion, Volume 28, Issue 108, 31 January 1935, Page 7
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35Temperature of the Sun’s Rays.—The direct solar radiation is measured by a thermometer enclosed in a vacuum. The bulb of this thermometer is coated with lamp black to facilitate the absorption of the heat. Dominion, Volume 28, Issue 108, 31 January 1935, Page 7
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