The University of Iowa Libraries: Capt. William Leahy and Dr. Mina Rees, Office of Naval Research and Dean Francis Murray Dawson at ballistics conference, The University of Iowa, 1950s.
The University of Iowa Libraries: Engineering student pouring substance into vat at Hydraulics laboratory, The University of Iowa, 1930s
The University of Iowa Libraries: Hydraulics engineering students at stream table, The University of Iowa, 1920s
The University of Iowa Libraries: Engineering students working with machines at Hydroelectric laboratory, The University of Iowa, 1910s
The University of Iowa Libraries: Graduate student operator Robert Hanlon setting dry feed machine at waterworks, The University of Iowa, January 1936
The University of Iowa Libraries: Graduate student operator Robert Hanlon washing a filter at waterworks, The University of Iowa, January 1936
The University of Iowa Libraries: Graduate student operator Robert Hanlon measuring basin turbidity with secchi disk at waterworks, The University of Iowa, January 1936
The University of Iowa Libraries: Graduate student operator Robert Hanlon measuring basin turbidity with secchi disk at waterworks, The University of Iowa, January 1936
The University of Iowa Libraries: Graduate student operator Robert Hanlon setting the chlorinator at waterworks, The University of Iowa, January 1936
The University of Iowa Libraries: Model of 1903 Des Moines River flood at Ottumwa, Iowa built by Paul L. Hopkins, The University of Iowa, 1920s
The University of Iowa Libraries: Model of dam in Hydraulics laboratory, The University of Iowa, 1930s
The University of Iowa Libraries: Examining water flow in Hydraulics laboratory, The University of Iowa, 1930s
The University of Iowa Libraries: Student manipulating equipment in Hydraulics laboratory, The University of Iowa, 1930s
The University of Iowa Libraries: Camera work in Hydraulics laboratory, The University of Iowa, 1930s
The University of Iowa Libraries: Adjusting levers and dials in Hydraulics laboratory, The University of Iowa, August 15, 1948
The University of Iowa Libraries: Examining water flow in Hydraulics laboratory, The University of Iowa, 1940s
The University of Iowa Libraries: Working with apparatus in Hydraulics laboratory, The University of Iowa, 1940s
The University of Iowa Libraries: Hydraulics laboratory work, The University of Iowa, 1940s
The University of Iowa Libraries: Men at open windows of Hydraulics laboratory, The University of Iowa, 1940s
The University of Iowa Libraries: Adjusting pressure valves in Hydraulics laboratory, The University of Iowa, 1940s
The University of Iowa Libraries: Student taking notes in Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Student adjusting valves in Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Examining water flow in Hydraulics laboratory, The University of Iowa, 1948
The University of Iowa Libraries: Examining water flow in Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Examining equipment in Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Experiment in progress at Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Man examining large pressure tank in Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Adjusting valves in Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Hydraulics laboratory, The University of Iowa, 1950s
The University of Iowa Libraries: Hydraulics laboratory equipment, The University of Iowa, 1950s