1993 29¢ Percy Lavon Julian
Issue Date: January 29, 1993
City: Chicago, IL
Printed By: Bureau of Engraving and Printing
Printing Method: Lithographed, engraved
A research chemist known for his many contributions to science, Percy Lavon Julian (1899-1975) joined other noted black Americans as part of the Black Heritage Series.
Julian was one of the first African Americans to receive a doctorate in chemistry., and the first to be inducted into the National Academy of Sciences. A pioneer in chemical synthesis of drugs used in medicine, Julian developed synthetic physostigmine for glaucoma, cortisone for arthritis, and the female hormone progesterone.
He also owned more than 100 chemical patents, many for products made from soybeans, including a soya protein used in fire extinguishers during World War II, and still used in paper manufacturing today.
Of interest to stamp collectors, Julian’s father was a railroad postal clerk.