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Start Over Subjects Ultraviolet Rays ✖Remove constraint Subjects: Ultraviolet Rays Authors Gould, George M. (George Milbry), 1848-1922, author ✖Remove constraint Authors: Gould, George M. (George Milbry), 1848-1922, author Titles Retinal insensibility to ultra-violet and infra-red rays ✖Remove constraint Titles: Retinal insensibility to ultra-violet and infra-red rays

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