Expanded Vermiculite Caspro Plaster Aggregate, California Stucco Products of N.E., Inc. 169 Waverley Street, Cambridge, Mass.
Description:
Product features are described for potential customers. There is a table with the title "A summary of fire-resistance ratings using metal lath and lightweight aggregate-gypsum plaster." The John Hancock Mutual Life Insurance Building on Berkeley Street was fireproofed with the plaster. The Boston University buildings on Commonwealth Avenue are also shown. Text on the front cover margin reads "A.I.A. File-21-A7."