Original heating trade vintage catalog for BARBER-COLMAN COMPANY, was located in Rockford, IL. Manufacturers of Automatic Electric Controls for Temperature, Humidity and Industrial Applications. Thermostats, Hygrostats, Valves, Damper Control Motors, Hot Water Storage Tank Control, Residential Air Conditioning System and Surface Cooler. Disbound from a large 1938 industrial heating catalog, this unique old four page technical brochure would display wonderfully matted and framed. A marvelous addition to your retro heating equipment library.