Study of a static screen, jig, spiral, and a compound water cyclone in a placer gold recovery plant
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Genres
- Gold ores
- Ore-dressing
- Ordnance
- United States
- Science and state
- Electric apparatus and appliances
- International cooperation
- Science
- Electric insulators and insulation
- Proximity fuzes
- Electrification
- Telemeter
- United States. Office of Scientific Research and Development
- Bombardment
- Aerial operations
- World War, 1939-1945
- United States. National Bureau of Standards
- Metric system
- Weights and measures
- Armed Forces
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