Original industrial trade vintage catalog for LEEDS & NORTHRUP COMPANY, was located at 4918 Stenton Avenue, Philadelphia, PA. Balance type recorder and controller for electrical power generation and transmission. Manufacturers of measuring instruments, telemeters, automatic controls and heat treating furnaces. Galvanometers, resistance boxes, potentiometers, micromax, Homocard furnace and more are discussed. Disbound from a large 1944 industrial construction materials book, this unique old two page technical specifications brochure would display wonderfully matted and framed. A marvelous addition to your retro industry equipment library. Pages are detached and contains a small amount of residual glue on edge.