Frances Hardcastle

Frances Hardcastle was an English mathematician who held fellowships in the United States. She studied point groups and wrote some important works. She also was a major figure in the Women’s Suffrage movement and was secretary of the National Union of Women’s Suffrage Societies.

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Ellen Hayes

Ellen Hayes was an American mathematician and astronomer. She was one of the first female American professors.

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Christina Kirk Henderson

Her mother’s mission work led Christina to take an active role in the Presbyterian Women’s Missionary Union of New Zealand. She served as secretary (1917–20) and president (1930–32), but her main contribution was her editorship, from 1923 until 1946, of Harvest Field, the union’s magazine.

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Sophie Willock Bryant

Sophie Willock Bryant was an Irish mathematician who also published on many other topics: Irish history, religion, education, women’s rights, and philosophy.

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