Architect and engineer . OORS ARE A THING OF THE PAST WHEREVER ARCHITECTS HAVE SPECIFIED Lapidolith T^HIS liquid chemical has been flushed on 70,000,000 square-L feet of concrete floors old and new during the last two yearsalone. These lapidolized floors are now wearproof and dust-proof, because Lapidohth has completed the hydration of thePortland Cement and this Concrete is harder than you seen the results secured by the Lapidolith treatment?If not, let us refer you to a lapidohzed floor near you. Thereafter-you will specify Lapidolith on your old and new concrete work. SONNEBORN


Architect and engineer . OORS ARE A THING OF THE PAST WHEREVER ARCHITECTS HAVE SPECIFIED Lapidolith T^HIS liquid chemical has been flushed on 70,000,000 square-L feet of concrete floors old and new during the last two yearsalone. These lapidolized floors are now wearproof and dust-proof, because Lapidohth has completed the hydration of thePortland Cement and this Concrete is harder than you seen the results secured by the Lapidolith treatment?If not, let us refer you to a lapidohzed floor near you. Thereafter-you will specify Lapidolith on your old and new concrete work. SONNEBORN PRODUCTS: Lignophol Cemcoat the durable Mill White, Washable, of exceptional covering capacity, .® modern wood preservative Gloss, Flat and Egg-shell, also all colors. gives new life to old or new wood-en floors. Write for sample, literature and specification form Concrete for PermanenceLapidolith for Dustlessness L. SONNEBORN SONS, Inc. San Francisco Los Angeles Seattle ??il!i:H--M;i: THE ARCHITECT AND ENGINEER 31. THE HOUSEBEAUTIFUL


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