DR. LANGLEY'S BOLOMETER. the temperature of the sun he compared the heat and light of the sun to that of THE BOLOMETER OR ACTINIC BALANCE. INFRA-RED SPECTRUM OF ROCK SALT PRISM. INFRA-RED SPECTRUM OF A ROCK SALT PRISM. THE ASTRO-PHYSICAL OBSERVATORY OF THE SMITHSONIAN INSTITUTION WASHINGTON D, scientific american, 1901-01-05
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