Columbian Carbon Co. - Specimen Stock Certificate

Specimen Stock printed by American Bank Note Company. William B. Wiegand (February 17, 1889 – August 18, 1976) was a research chemist originally from Canada who later became an executive in the chemicals industry. He served as vice president of Columbian Carbon Co. and was recognized for his groundbreaking contributions to carbon black technology. Wiegand invented a type of heat engine known as the rubber pendulum, which was based on the Gough-Joule effect. In the latter part of his career, he investigated the reinforcing properties of carbon black in rubber, suggesting that these properties result from interactions at the interface between carbon black and the surrounding elastomer matrix. He was instrumental in the development of the furnace method for carbon black production. In 1923, Wiegand held the position of chair for the ACS Rubber Division. He was awarded the Colwyn Medal in 1956 and the Charles Goodyear Medal in 1960. Born in Conestogo, Ontario, Canada, on February 17, 1889, he passed away in Bernardston, Massachusetts, on August 18, 1976, at the age of 87.