The extensive collection of Hercules advertising materials, covering the years 1913 through 1952, documents the company's growth as a major manufacturer of chemical products. A portion of the 1939 edition is digitized here with content covering a range of explosives and naval stores products, including Vibrogel and Vibrocaps, Ethyl Cellulose, Chlorinated Rubber, Yarmor Pine Oil, and D.H.S. Activator.
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