Word: calley
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Dates: during 1930-1939
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...first, a technicolor sound picture with Edwin C. Hill as commentator, follows the manufacture of steel from the mines to the finished product. Depicted in the second film are some of the constructive operations of the Tennessee Calley Authority. The last picture shows work on the Grand Coulee Dam, largest in the United States, in which the process of solidifying the soil by freezing was successfully used...