American advocate of women’s rights, born at Henrietta, NY, on the 20th of May 1825. She graduated at Oberlin in 1847, and after studying and teaching, took a course of theology, which she completed at Oberlin in 1850, but upon applying for a license to preach, she was refused. She preached upon invitation and her own responsibility, and in 1853 was regularly ordained pastor of the Congregational Church at South Butler, Wayne County, NY, retaining her charge only a year. In 1855 she investigated the phases of vice in New York City. Next year she married Samuel C. Blackwell, brother of Elizabeth Blackwell. Mrs. Blackwell has since become a Unitarian, and a prominent champion of women’s rights. Among her works are Shadows of Our Social System (1855); Studies in General Science (1869); The Market Woman (1871); The Island Neighbors (1871); Sexes Throughout Nature (1775); Physical Basis of Immortality (1876); etc.