Business floors of Armstrong's linoleum : for offices, public buildings, banks, hotels, stores, restaurants, theaters, libraries, churches, schools, hospitals, rest rooms, club rooms, etc. (1924)
<<> XPiOttt ■ • «> • • … Fig* 3—The Indentation Test Tests That Insure Standard Quality in Armstrong's Linoleum UNTIL recently, the chief test to determine the maturity of linoleum was the "educated thumbnail." A workman pressed a practised thumbnail into every run of linoleum to see if the piece of goods was sufficiently…