1847-1930
American psychologist, logician, and an internationally recognized authority on the theory of color vision.

Born in Windsor, Connecticut, Christine Ladd-Franklin spent her early childhood in New York City. Her father was a prominent merchant and her mother was a feminist. Following her mother's death when Ladd-Franklin was 13, she moved to Portsmouth, New Hampshire, to live with her paternal grandmother. Ladd-Franklin attended the Wesleyan Academy in Wilbraham, Massachusetts for two years, taking classes with boys preparing to enter Harvard University, and was the valedictorian of her graduating class in 1865. After graduating from Vassar College in 1869 with a primary interest in mathematics and science, she taught in secondary schools in Pennsylvania, New York, and Massachusetts for more than a decade and also published numerous articles on mathematics during this period. In 1878, she...