s in climates where corrosion is a problem; there are the cellulose plastics, and particularly ethyl cellulose, developed in 1944 for use as a hot melt dip coat applied to engines and parts to prevent corrosion; there are the phenolic resins, for which a new use as laminated plastic rocket tubes was developed in 1943; and there are the blood plasma byproducts, such as fibrin foam, which when dried