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This small book deals with the use of visible and invisible light rays through colored filters. There are chapters devoted to history, physics, erythema, action on bacteria, filters, lamps, technic and clinical observations. The author advocates the use of visible light through colored filters and makes many extravagant claims for the value of such radiations. Because of the fact that practically all modern experts in light therapy have considered that the use of colored lights can have no other effect on the human body than a psychic one, and because a noted authority on the physics of light, W. W. Coblentz of the Bureau of Standards of the United States government and member of the Council on Physical Therapy of the American Medical Association, has said "If the rays in the visible spectrum have any special therapeutic action, it remains to be determined," this textbook was reviewed with considerable care
Elements of Chromotherapy: The Administration of Ultra-Violet, Infra-Red and Luminous Rays Through Colour-Filters. JAMA. 1938;110(24):2029–2030. doi:10.1001/jama.1938.02790240053027
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