How it works

Copyright: Registered 1Nov74 · MU9148 (Jul-Dec 1974) Copyright holder: The Gillette Company Registered 11Mar75 · MU9257 (Jan-Jun 1975) Copyright holder: The Gillette Company

Description: Episode number 1 of Series “The Open hearth furnace series”. An explanation of how the furnace is constructed to withstand the very high temperatures needed to make steel. The system of regeneration by which gas and air are heated before being burned in the furnace is also illustrated.