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It will not be amiss, at this time of celebrating the eightieth birthday of Virchow, to call attention to the fact that a new era in medicine began in the middle of the last century when the cellular structure of living organisms and of many pathological products became understood. The era was introduced by the demonstration of the cellular structure of plants by Schleiden, in 1838, and of animals by Schwann, in 1839. The rich fields of investigation thus thrown open for cultivation were soon appropriated by eager German investigators, and pre-eminently by the now so venerable Virchow and his numerous and enthusiastic pupils. Virchow may be said to have begun his work in 1840, and in a remarkably short time he not only made an end to the domination of medicine by the unfounded conceptions of the old humoral pathology, which had held sway for some two thousand years,
CELLULAR PATHOLOGY IN THE PAST AND IN THE FUTURE.. JAMA. 1901;XXXVII(16):1039-1040. doi:10.1001/jama.1901.02470420027004