1934 Print Johns-Manville Asphalt Sheet Cork Frigidaire Insulation Bourke FZ3 XGX3 This is an original 1931

This is an original 1931 black and white print ad for the North German Lloyd Cruise Line

Keywords specific to this image: Draper

Please note the small mark on the left

and performing various other duties

1934 Print Johns-Manville Asphalt Sheet Cork Frigidaire Insulation Bourke FZ3 XGX3 This is an original 1931This is an original 1934 halftone print of a layer of asbestos insulation at the Johns Manville Company. The caption writes, "Move the fibers along a revolving belt and with a saw toothed edge lift them off and keep them from piling up into a tangled mass. The rock wool contains millions of cells of dead air that supply its insulating property. Mixed with asphalt and pressed into sheets, it becomes rock cork, used in Frigidaire and other low