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To the Editor:
—An interesting editorial note (The Limatations of Specificity in the Transmission of Disease, The Journal, March 1, p. 675), on the inoculability of cancer in different species of animals, gives the impression that those observations and experiments are only recent in time. In the good name of American science, I refer you to the Proceedings of the Academy of Natural Science, Philadelphia, May and June, 1851, in which the late Joseph Leidy repeats the results of his experiments on the inoculability of cancer. The experiments were conducted at the Academy of Science, and from the results obtained by introducing portions of (human) cancerous tissue into frogs, Leidy observed after a full description and demonstration before the academy, that "the experiments not only proved the independent vitality of tissues, which was generally admitted, but rendered it exceedingly probable that cancer was inoculable, for as, in the experiments the
Leidy J. Inoculability of Cancer—A Question of Priority. JAMA. 1913;60(15):1173–1174. doi:10.1001/jama.1913.04340150055022
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