Two students conduct a hearing test. The back of the photo reads: "Demonstrating the uses of the Puretone Machine." The Puretone Machine was a machine which tested hearing using a puretone standard.
Students -- North Dakota -- Grand Forks; Teachers -- North Dakota -- Grand Forks; Universities & colleges -- North Dakota -- Grand Forks
North Dakota--Grand Forks; North Dakota
University of North Dakota
Elwyn B. Robinson Department of Special Collections, Chester Fritz Library, University of North Dakota
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