George Caldwell served as president of the American Chemical Society (ACS) in 1892. Prior to this time, the ACS had been a rather parochial New York City based organization. In 1890, the constituency of the ACS expressed its desire to become a truly national body. Toward this end, it forged closer ties with the Chemical Section of the American Association for the Advancement of Science (AAAS), and merged with the Chemical Section in 1891. As Caldwell had been active with the AAAS group for several years previous to this merger, his election to the presidency of the ACS can be seen as an expression of unity in the American chemical community.
Munday, Pat, "George C. Caldwell (1834-1907): American Agricultural Chemist" (2023). Interdisciplinary Arts and Sciences Articles. 1.