This folder contains correspondence and other documents relating to Edison's dealings with Armington and Sims, manufacturer of steam engines for Edison central stations. Some of the letters are testimonials to the quality of the company's engines. Among the correspondents are Theodore Andrews, secretary of the company; Pardon Armington, treasurer; and Gardiner C. Sims, general manager.

All of the documents have been selected except for duplicate copies of selected material.

Courtesy of Thomas Edison National Historical Park.