This folder contains correspondence and other documents relating to the analysis of ore briquettes, construction of the bricker, and the market for Edison's ore. Some items concern activities at the mill, including the acquisition of a dynamo and management techniques. Other items pertain to tax matters. Most of the correspondence is between Edison and the Philadelphia firm, Pilling & Crane. Approximately 50 percent of the documents have been selected. Courtesy of Thomas Edison National Historical Park.