1934 Print Johns-Manville Asphalt Sheet Cork Frigidaire Insulation Bourke FZ3 YASF1 TIN4A5B4C99

TIN4A5B4C99

Keywords specific to this image: Angel and Horn

wooden cart

FZ3A7C39 zz5454

and some small tears in the right and left margins --please see image

1934 Print Johns-Manville Asphalt Sheet Cork Frigidaire Insulation Bourke FZ3 YASF1 TIN4A5B4C99This 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