This folder contains correspondence and other documents relating to Edison's Menlo Park laboratory. Some documents concern experimental work undertaken at the laboratory. Other material deals with the closing of the laboratory and the disposition of its contents. Much of the correspondence is by two Edison associates, Thomas Logan and John F. Ott.

Approximately 20 percent of the documents have been selected. The following categories of documents have not been selected: routine correspondence with suppliers; routine intraoffice communications; accounts; bills.