Emma A. McDonald (1843-1893) was born in Green Bay, Wisconsin, and died in Fort Howard, Wisconsin. She was a student of Mary Baker Eddy's, completing the Primary (1883), Normal (1884), and Obstetrics (1887) classes. She joined the Christian Scientist Association in September 1886, and she joined The First Church of Christ, Scientist, in Boston, on July 1, 1893. McDonald also advertised as a practitioner in The Christian Science Journal. She and her husband, Hugh McDonald, are credited with being the first to learn of Christian Science in Oconto, Wisconsin.

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