This folder contains correspondence and other documents pertaining to the testing, production, procurement, and sale of chemical supplies. The selected items were sent to Edison by his brother-in-law John V. Miller, manager of the Edison Chemical Works, and most bear his marginalia. Included are letters relating to the production of iron by hydrogen and the sale of the surplus iron to pharmaceutical companies.

Less than 1 percent of the documents have been selected. The material not selected consists of weekly and monthly reports, chemical analyses, and correspondence with customers and suppliers. Many of these items bear Edison's initials in the form of marginalia.