George T. McLauthlin (1826-1895) was a Boston-based businessman, inventor, and student of Mary Baker Eddy's, studying with her in June 1876. He founded Geo. T. McLauthlin Co., a manufacturing and iron working business based at 120 Fulton Street. Eddy corresponded with McLauthlin until 1877. There is no evidence of him uniting with Eddy's church or the Christian Scientist Association, her association of students.

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