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Start Over Subjects Hays, Isaac, 1796-1879. ✖Remove constraint Subjects: Hays, Isaac, 1796-1879. Titles Memoir of Isaac Hays, formerly one of the censors of the College of Physicians of Philadelphia, president of the Academy of Natural Sciences, surgeon to Wills Hospital, etc: read before the College, February 4, 1880 ✖Remove constraint Titles: Memoir of Isaac Hays, formerly one of the censors of the College of Physicians of Philadelphia, president of the Academy of Natural Sciences, surgeon to Wills Hospital, etc: read before the College, February 4, 1880

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  • Memoir of Isaac Hays, formerly one of the censors of the College of Physicians of Philadelphia, president of the Academy of Natural Sciences, surgeon to Wills Hospital, etc: read before the College, February 4, 18801