Instruments and methods of radiometry II
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W.W. Coblentz
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Article
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1918
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Elsevier Science
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English
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THE behavior of the Marvin Py~heliometer has been investigated in detail. The instrument was calibrated by two methods, one in which a known amount of electrical enet,gy was dissipated in the receiver, and ,the other in which a known amount of" radiation from a black body was allowed to fall upon th