13162_10666_sonar_crystals
Subjects
1954
B&W
Utah: Ammonium dehydrogen phosphate production. Shots of: crystals being dissolved and re-crystalized, workers putting insulating blankets around cylinders, a shot down in a tank shows large crystal rotating in the liquid, crystal used for sonar equipment, an expert cuts the crystals in a unique machine. A woman handle a crystal and prepare it for use. Segment ends with a submarine at sea traveling slightly above the water.