This folder contains correspondence, reports, and other documents relating to the business and finances of the Edison Machine Works. Much of the correspondence is by Samuel Insull, general manager and treasurer. Many of the letters relate to problems in the development and sale of dynamos, insulated wiring, and other products. There are also letters and reports pertaining to the finances of the company. One letter to Alfred O. Tate questions the motives and reliability of Edison's Japanese employees. Some of the documents are damaged and partially illegible.

Approximately 60 percent of the documents have been selected. The following categories of documents have not been selected: letters of transmittal; correspondence regarding routine business activities; routine orders for the West Orange laboratory and the Edison Phonograph Works; duplicate copies of selected documents.

Related documents can be found in D-88-39 (Electric Light - Foreign - General) and D-88-56 (West Orange Laboratory - Suppliers).