Original window trade vintage catalog for DAYTON GREENHOUSE MANUFACTURING COMPANY. Main office and factory was located in Dayton, OH. Manufacturers of Sludge Bed Enclosures. Enclose sewage plants. Architect specifications include framework, gutters, sill for foundation wall, woodwork, ventilating and painting details. Unbound from a large 1931 architectural catalog, this unique old one page technical brochure would display wonderful matted and framed. Nice graphics. A terrific addition to your retro window library. Slight damp stain on outer edge.