Original concrete trade vintage catalog for AMERICAN TRIPOLI COMPANY, was located at 1636 Arcade Building, St. Louis, MO. Manufacturer of Barnsdall Admix for concrete. One of the most concentrated admixture and waterproofing known. Prevents leakage of cement, reduces shrinkage and prevents disintegration. This unique 1931 old one page building construction brochure would be a marvelous addition to your retro engineering library. It would display beautifully matted and framed.