A pamphlet on the medical uses of Lloyd's Hydrastis : the new pharmaceutical preparation containing the active principles of Hydrastis Canadensis, as shown by the clinical investigations of practicing physicians to whom specimens of it were submitted.

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A pamphlet on the medical uses of Lloyd's Hydrastis : the new pharmaceutical preparation containing the active principles of Hydrastis Canadensis, as shown by the clinical investigations of practicing physicians to whom specimens of it were submitted.