Mary Peters Fieser

Who was Mary Peters Fieser?

Mary Peters Fieser was an American chemist best known for the many books she wrote with her husband Louis Fieser.

She was born Mary Peters in 1909 in Atchison, Kansas. Her father, Robert Peters, was a college professor of English: the family later moved to Harrisburg, Pennsylvania, when he accepted a position at the Carnegie Institute of Technology. Mary and her sister Ruth were educated in a private girls’ high school, and both went on to study at Bryn Mawr College. Mary graduated from Bryn Mawr in 1930 with a B.A. in chemistry.

It was at Bryn Mawr that Mary Peters met her future husband, a professor of chemistry who became her mentor. When Louis Fieser left Bryn Mawr in 1930 to join the faculty at Harvard University, Mary Peters decided to follow him and pursue an advanced degree in chemistry. She had to officially enroll at nearby Radcliffe College in order to take chemistry courses at Harvard and could not escape the gender discrimination of her era. One professor of analytical chemistry in particular, Gregory Baxter, would not allow her in the laboratory with the male students: rather, she had to carry out her experiments in the deserted basement of a nearby building.