Correspondence, accounts and receipts of the Harglo Glass Company of Salem, WV. The Harglo Co. specialized in the manufacture of glass for lamps and lighting fixtures, in many cases a subcontractor for other glass and lamp manufacturers. Its products were marketed through its affiliate, Glass Products Co. of Salem, WV. The billing and correspondence is with other glass companies, shipping companies, glass mould and equipment manufacturers, and companies producing non-clear glass or coatings for glass. Other West Virginia glass manufacturers mentioned are Beaumont Glass Co., Fenton Art Glass Co., Louie Glass Co. and the Pennsboro Glass Co.