1943

Emphasizes the role quartz plays in war communications, showing how a wafer of its crystal makes possible the simultaneous broadcasting of many stations without overlapping. Pictures the hard manual labor involved in mining Brazilian quartz, the inspection, the exportation of most of it to the United States, and the laboratory cutting of it to fit the complex instruments of World War II. 

Indiana University Audio-Visual Center; U.S. Office of Education

Educational

Quartz mines and mining -- Brazil ; Quartz crystals ; Radio -- Equipment and supplies ; World War, 1939-1945 -- Equipment and supplies ; World War, 1939-1945 -- Communications ; Communications, Military.

Government films

IUL Moving Image Archive

English

1 Film (0:10:00); 16mm

Gift to the IUB Libraries from Instructional Support Services. 

IULMIA Film Database: 40000003095777; Other: GR00467239; OCLC: ocn989125646; OCLC: 989125646