Correspondence, and administrative, financial and production records of the Crystal Salt Company, Warsaw, New York. Includes letterbooks, articles of incorporation, contracts, deeds, stock shares and insurance policies, annual reports, account books, bankbooks and check stubs, invoices, purchasing, receiving and sales and shipping records. Also includes several Charles Beard letters, and correspondence of Howard Lee McBain, Professor of Political Science, George Washington University.

Includes act of incorporation; notification to members of the corporation of first meeting; and an act to extend rights and privileges of water power on the Nashua River.