1888 [Supplied year] Marks, William Dennis to Johnson, Edward Hibberd
(Vail, John H; Insull, Samuel) Engines, boilers, prime movers; Dynamos and generators; Central stations
[D8831]  Document File Series -- 1888: (D-88-31) Electric Light -- Edison Electric Light Co -- Illuminating Cos
[D8831ACP; TAEM 123:244]
Courtesy of Thomas Edison National Historical Park.