Charles Mayer Wetherill

Born in Philadelphia in 1825, he studied at the University of Pennsylvania and later earned a Ph.D. in organic chemistry at the University of Giessen, one of the great centers of nineteenth-century chemical research. He went on to build a career that connected laboratory science with teaching and public service.

In 1862, he was appointed the first chemist in the newly organized U.S. Department of Agriculture and led its Chemical Division. That small federal unit would later develop into the Bureau of Chemistry and, ultimately, part of the institutional history behind the U.S. Food and Drug Administration. His work focused on useful, everyday questions, including fertilizers, wine, and the adulteration of agricultural products.

He also taught chemistry, including at Lehigh University, where he served in the final years of his life. Wetherill died in Bethlehem, Pennsylvania, in 1871, leaving behind a career that shows how early American science was beginning to move from private study into national institutions.