Business records and photographic materials documenting the International Salt Company. The business records include correspondence, account and ledger books, a payroll book, patent and trademark information, print advertising, and a salesman's display kit. The photographic materials include a series of photographs by William M. Rittase, a series of photographs by Harold Haliday Costain, a small photograph album, snapshots, and slides. The images cover all facets of the salt manufacturing and packaging operations, and include photographs taken in New York State, Michigan, and Louisiana.
International Salt Company Records, 1881-1993, Archives Center, National Museum of American History