A fascinating look at early 20th-century switchboards for power, light, manufacturing, and transportation. Hervey S. Walker first published this detailed illustrated guide to switchboards in 1911 for engineers across America who built the great industrial complexes that grew the United States into an economic powerhouse with operations controlled by switchboards. This classic book is enhanced by hundreds of photographs of the fronts and backs of switchboards, knife switches, gauges, choke coils, lighting arrestors, panel boards, radial voltmeter switches, classic engineering diagrams, and more. Engineering historians and electrical engineer enthusiasts will enjoy this unique look at the bygone era of industrial controls and operations that ran factories, manufacturing plants, ships, railroads, newspapers, apartment buildings, and more. Includes a look at select switchboards from famous companies including: Hershey Chocolate Company The Standard Oil Company Eastman Kodak Company Pennsylvania Railroad New York Tribune U.S. Mint Refinery in San Francisco Pittsburgh and Conneaut Dock Company U.S. Battleship “Virginia” Youngstown Tube and Sheet Company National Starch Company Republic Iron and Steel Company And more… Selections from the Table of contents: The Function of the Consulting Engineer Archaic Switchboards The Location of the Switchboard Of What Shall the Switchboard be Built The Back of the Switchboard Motor-Operated Rheostat Remote Control Circuit Breakers Alternating Current Switchboards Fuses Amperes per Line at Various K.W. and Voltages Diagram of Switchboard Connections; Two-Phase System Diagram of Switchboard Connections; Three-Phase System Field Discharge Switches Voltmeter Plug and Recepticle Disconnecting Switches Wires and Cables Conduit Details And more…