Stephen Moulton Babcock, 1843-1931, was a professor of agricultural chemistry at the University of Wisconsin. He is best known for the Babcock test, a method of measuring butterfat content in milk. His research on the nutrition of dairy cattle paved the way for the discovery of vitamin A.
Dr. Babcock refused to patent his test for butterfat. Illustrated with historical photographs, this section of "It Happened Here" tells the story of the Babcock test, and describes the professor's personality. www.library.wisc.edu/etext/WIReader/WER0659-1.html