Two testtubes in pullorum tube agglutination test, negative (left), positive (right).
University Photograph Collection
Discend Broody Coops at Poultry Plant, July 9, 1925.
Man working with a large machine.
A man watching another man saw a log
Two men talking with a woman, 1970.
Student pruning pine trees
Women indoors, playing volleyball.
Man bundling christmas trees
William J. MacKnight (standing), looking at a printout with another man in Goessman, October 25, 1967.