Motion pictures (visual works).
Subject Source: Art & Architecture Thesaurus
Found in 1 Collection or Record:
Abstract Ralph Parshall contributed significantly to the field of irrigation engineering with the development of a flow-measuring device that became commonly known as the Parshall flume and continues to be widely used. Materials in the collection include Parshall's patent on his "Venturi flume water stage recording instruments," awards that Parshall received, publications, copies of talks he presented on KOA radio in Denver, and a number of lantern slides depicting flumes, weirs, plans, and...
Dates: 1888-1992; Majority of material found within 1921-1961