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November 25, 1899


JAMA. 1899;XXXIII(22):1372. doi:10.1001/jama.1899.02450740060020

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Fort Dodge, Iowa, Nov. 10, 1899.

To the Editor:  In the Journal for October 21 (p. 1049), I note your comments on "Phototherapy." In the June number of the Iowa Medical Journal, I called attention to work done along this line by myself. This was some four months in advance of the publication of Finsen's paper quoted by you.At the time of writing my paper I was limiting treatment to the use of rays concentrated by a twelve-inch condensing lens. The volume of sunlight thus utilized was found to be too small, and I have had constructed a metallic reflector that pours a volume of concentrated sunshine over the entire thorax and abdomen, which is as hot as the patient can bear. The heat rays are excluded as much as possible. This reflector is used in the same manner in which Archimedes is said to have fired the Roman

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