The photodermoplanimeter

Abstract
A description is given of an instrument which measures the radiation area of the human body. An isotropic flux of light is produced in a large integrating vessel and when a human subject whose skin has been suitably blackened enters the vessel, the light intensity at a window in the wall of the vessel is decreased. A photometric measurement of this decrease enables the effective area of the surface of the skin of the subject to be measured with an accuracy of better than 1%. The instrument enables measurements to be made on large numbers of subjects rapidly and reliably. human body surface; radiation area; photometric measurement Submitted on April 5, 1963

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