Brazilian quartz goes to war
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
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.
- Rights Statement
- No Copyright - United States
- Physical Description
1 Film (0:10:00); 16mm
Gift to the IUB Libraries from Instructional Support Services.
- Other Identifiers
IULMIA Film Database: 40000003095777; Other: GR00467239; OCLC: ocn989125646; OCLC: 989125646
This item is accessible by: the public.