
author
1875–1952
A leading American veterinarian and public servant, he spent decades at the U.S. Department of Agriculture helping shape the nation’s response to livestock disease. His work connected science, farming, and public health at a time when animal epidemics could threaten the country’s food supply.

by United States. Bureau of Animal Industry, V. T. (Vickers T.) Atkinson, Dr. (William) Dickson, A. (Adolph) Eichhorn, Richard W. (Richard West) Hickman, James Law, (Dr.) (William Herbert) Lowe, C. Dwight (Charles Dwight) Marsh, John R. (John Robbins) Mohler, A. J. (Alexander James) Murray, Leonard Pearson, Brayton Howard Ransom, M. R. (Milton R.) Trumbower, Dr. (Benjamin Tilghman) Woodward
Born in Philadelphia in 1875, John Robbins Mohler studied veterinary medicine at the University of Pennsylvania, graduating in 1896. Soon after, he joined the U.S. Department of Agriculture, beginning a long federal career devoted to animal health.
Mohler worked his way up through the Bureau of Animal Industry, becoming chief of its pathological division and later chief of the bureau itself in 1917. He remained in that post until his retirement in 1943, and his work focused especially on major livestock diseases such as foot-and-mouth disease and tuberculosis.
Alongside his government service, he wrote and edited many practical publications on animal disease control and veterinary science. Remembered as an important figure in American veterinary medicine, he helped build the systems that protected herds, supported farmers, and linked animal health to human welfare.