Chicago, Nov. 28, 1906.
To the Editor:
—Dr. David L. Edsall's article in The Journal, Nov. 3, 1906, so overstates, in my opinion, the dangers from x-ray exposures that it should not go without reply. Dr. Edsall's article begins with several paragraphs devoted to an implied criticism at the tardiness of the recognition of deep-seated effects of x-rays and at the purely empirical use of x-rays as a therapeutic agent His opening sentence is: "In its relation to medical practice, one of the most remarkable things about the x-ray is the tardiness with which there was any realization of its power of producing very marked changes in other tissues than those superficially situated. "X-rays were discovered November, 1895. To cite no other illustration, as long ago as the summer of 1897, W. Stone Scott reviewed the cases in which deep-seated effects were thought to have occurred from x-rays without corresponding