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The author has endeavored to include in this book the fundamental knowledge necessary for some comprehension of the uses of light in the treatment of disease. He describes the different kinds of apparatus that are available, giving particular attention to questions on the penetration of light when supplied in various forms. On this topic he has made independent research, which is of value. He distinguishes clearly the effects of light from the various portions of the spectrogram, accepting largely the statements of Hays and Humphris as to the value of infra-red. The author has apparently selected with judgment from current textbooks and from advertising literature on this subject. His book will be found helpful by all who are interested in scientific developments in this field.
The Basis of Light in Therapy. JAMA. 1927;88(7):507. doi:10.1001/jama.1927.02680330059040
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