JAMA. 1903;XL(8):511-514. doi:10.1001/jama.1903.92490080026002h.
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The employment of the mysterious x-rays for the treatment of various skin diseases has ceased to be the monopoly of a few privileged promoters and is gradually becoming almost indispensable in the work of the up-to-date dermatologist. Much has been learned in this new field of practical medicine. More remains to be accomplished before the new agent can be handled with scientific accuracy. At the present moment there is still a deplorable diversity of opinion concerning some vital points in the theory and practice of radiotherapy. The controversy as to the real active principle emanating from the Crookes' tube is apparently still unsettled. Freund and Kienboeck may be mentioned as important representatives of the two opposing factions. The former, after persistently attributing the bulk of the x-ray effects to peculiar electric discharges or waves from the tube, seems of late to somewhat recede from his position. Kienboeck, who regards the


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