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Credit
On the dynamics, principles and philosophy of organic life : an effort to obtain definite conceptions of how do medicines produce their effects? : valedictory address, delivered to the Muskingum County Medical Society, at its annual meeting, held in the city of Zanesville, Ohio, May 6th, 1868 / by Z.C. McElroy. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.