This folder, which covers the period January-April 1915, contains correspondence relating to the construction of plants to reclaim benzol from coal gases at the works of the Cambria Steel Co. in Johnstown, Pennsylvania; Woodward Iron Co. in Woodward, Alabama; and Dominion Iron & Steel Co. in Sydney, Nova Scotia. Most of the items are routine orders for parts and materials, handled by Edgar S. Opdyke, purchasing agent for the Edison Portland Cement Co. and manager of several of Edison's chemical plants at Silver Lake, New Jersey. Other correspondents include Harry F. Miller, who received copies of the orders from Opdyke for approval. Some of the items bear brief marginal notations by Edison.
Approximately 15 percent of the documents have been selected. The unselected material consists of routine orders, shipping records, and correspondence pertaining to orders for the Edison Portland Cement Co. Courtesy of Thomas Edison National Historical Park.