This folder contains correspondence and other documents relating to electric lighting and power. Included are letters pertaining to cable insulation, electrocution, insurance for central stations, and lamp filaments. There is also correspondence from Charles T. Porter in regard to a Porter engine at the West Orange laboratory; a letter by Hermann Claudius about the early electric light work done at Menlo Park and Pearl Street; and a copy of an article by Dr. Henry G. Piffard describing the use of Edison current for medical purposes.
All of the documents have been selected. Courtesy of Thomas Edison National Historical Park.