Gamewell Fire Alarm Telegraph Company, Fire and Emergency Alarm Systems. General Electric Company, Motors, Power House and Sub-station Switchboards, Control Apparatus, Cable. General Incandescent Arc Light Company, Passenger Station Switchboards. India Rubber & Gutta Percha Insulating Company, Cables. Keasby & Mattison Company, Asbestos. Malleable Iron Fittings Company, Third Rail and other Castings. Mayer & Englund Company, Rail Bonds. Mitchell Vance Company, Passenger Station Electric Light Fixtures. National Conduit & Cable Company, Cables. National Electric Company, Air Compressors. Nernst Lamp Company, Power Station Lighting. Okonite Company, Cables. Prometheus Electric Company, Passenger Station Heaters. Roebling's Sons Company, J. A., Cables. Reconstructed Granite Company, Third Rail Insulators. Standard Underground Cable Company, Cables. Tucker Electrical Construction Company, Wiring for Tunnel and Passenger Station Lights. Westinghouse Electric & Manufacturing Company, Alternators, Exciters, Transformers, Motors, Converters, Blower Outfits. Westinghouse Machine Company, Turbo Alternators. * * * * * _Mechanical and Architectural Department_ John Van Vleck, Mechanical and Construction Engineer. Power house and sub-station, steam plant, repair shop, tunnel drainage, elevators. POWER HOUSE Alberger Condenser Company, Condensing Equipment. Allis-Chalmers Company, Nine 8,000-11,000 H. P. Engines. Alphons Custodis Chimney Construction Company, Chimneys. American Bridge Company, Structural Steel. Babcock & Wilcox Company, Fifty-two 600 H. P. Boilers and Six Superheaters. Burhorn, Edwin, Castings. Gibson Iron Works, Thirty-six Hand-fired Grates. Manning, Maxwell & Moore, Electric Traveling Cranes and Machine Tools. Milliken Brothers, Ornamental Chimney Caps. Otis Elevator Company, Freight Elevator. Peirce, John, Power House Superstructure. Power Specialty Company, Four Superheaters. Ryan & Parker, Foundation Work and Condensing Water Tunnels, etc. Robins Conveying Belt Company, Coal and Ash Handling Apparatus. Reese, Jr., Company, Thomas, Coal Downtake Apparatus, Oil Tanks, etc. Riter-Conley Manufacturing Company, Smoke Flue System. Sturtevant Company, B. F., Blower Sets. Tucker & Vinton, Concrete Hot Wells. Treadwell & Company, M. H., Furnace Castings, etc. Walworth Manufacturing Company, Steam, Water, and Drip Piping. Westinghouse, Church, Kerr & Company, Three Turbo Generator Sets and Two Exciter Engines. Westinghouse Machine Company, Stokers. Wheeler Condenser Company, Feed Water Heaters. Worthington, Henry R., Boiler Feed Pumps. SUB-STATIONS American Bridge Company, Structural Steel. Carlin & Company, P. J., Foundation and Superstructure, Sub-station No. 15 (143d Street). Cleveland Crane & Car Company, Hand Power Traveling Cranes. Crow, W. L., Foundation and Superstructure Sub-stations Nos. 17 and 18 (Fox Street, Hillside Avenue).