Vol. 42, no.1- Jan. 1938- each issue qin 2 partsq, pt.2 being a Statistical and technical data section, loose but paged in. (July 1938 qin 3 partsq, pt.3 being index).aquot;Audubon Wire Cloth, aquot; Catalog 40, complete with specifications, list prices, and miscellaneous information. ... aquot;Industrial Head aamp; Eye Protectionaquot; presents unusually complete line of goggles, eye shields, welding helmets, ... aquot;Alloy Sheet Steelaquot; (Copper-Nickel-Molybdenum), by Howard L. Miller, a paper on the commercial consequences of these ... Consists of only 3 major parts: rotor, blades, and impeller.