Original oil and gas trade magazine vintage ad for NATIONAL FOAM SYSTEM, INC of Philadelphia, PA. Promptly Controlled. National Super Ejector and Chemicals. Pictured a very serious, still fire was easily extinguished with one National Super Ejector and National Chemicals. The area was quickly covered with an effective foam blanket. This unique 1931 old petroleum oilfield equipment and supplies magazine advertisement would display beautifully matted and framed. Great graphics.