: Aerodyne mine ventilation fan made by the Jeffrey Manufacturing Company of Columbus, Ohio, inside the factory, 1937. Ventilation fans were used to force fresh air into underground mines for miners to breathe and to dissipate poisonous gasses. This fan was 162 inches in diameter and was made for the Carter Coal Company, location unknown. View on Ohio Memory.
: AL01574 Subjects
: Mining machinery; Jeffrey Manufacturing Company (Columbus, Ohio); Manufacturing industries--Ohio; Ohio Economy--Economy--Business Places
: Columbus (Ohio); Franklin County (Ohio);