MECHANICAL EQUIPMENT CONSERVES LABOR IN HIGHWAY CONSTRUCTION Part 1

Description

Cranes remove aggregate (sand and crushed rock) from railroad cars, the aggregate and cement are measured in large boxes and mixed, the mixture is discharged onto a graded road bed, the road is smoothed by Koehring pavers, and earth dikes are thrown up to prevent seepage onto the new pavement.

Collection

Records of the Extension Service

Series

Motion Picture Films