These documents relate to the manufacture of "P. [pure] Phenol" at Phenol Plant No. 1, the carbolic acid plant owned by Thomas A. Edison, Inc. Many of the selected items are interoffice communications by H. H. Meno Kammerhoff, manager of the Carbolic Acid Division. Other correspondents include Edison officials Archibald C. Emery, Stephen B. Mambert, William H. Meadowcroft, and Carl H. Wilson. There are also production reports signed by Kammerhoff and bookkeeper Walter E. Burton and initialed by plant superintendent Ralph C. Hendrickson. The subjects covered include operations and labor issues, sales and purchasing, and the relationship between Kammerhoff's plant and "Mr. Edison's plant" (Phenol Plant No. 2). Some of the items are addressed to Edison or bear his marginalia.

Less than 10 percent of the documents have been selected. The unselected items include duplicates, routine daily production reports, financial and accounting documents, inventories, and other material not directly related to Edison.

Courtesy of Thomas Edison National Historical Park.