Illinois Society of Architects · Chicago · leaf 21
19 U. S. GYPSUM PRODUCTS Distinct Advances in the Construction of Interior Walls and Ceilings … PYROBARGYPSUM TILE For fireproof partitions,steel protection,elevatorenclosures, wall furring,etc. Approved by Na-tional Board of FireUnderwriters. Has fourteen points ofsuperiority over othermaterials now in use for similar construction. The facts are interesting and worthy of your most careful…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
