October 22, 1843: Stephen Babcock, inventor and professor, was born in New York state. He came to the University of Wisconsin in 1887 as professor of agricultural chemistry. Babcock's inventions and developments included a device that measured the fat content of milk, the "cold storage" method of curing cheese, cream separators and viscosity testers. He also contributed to tests which led to the discovery of vitamin A by others. Died: July 2, 1931.