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Agricultural Engineers alternating current American automatic automobile bulb C. P. Steinmetz cars cent central station Chapter coil comfort Consolidated Edison cost dollars drive efficiency elec Electric Company electric current electric power electrical energy electrical industry electrified electrons employment equipment factor farm farmers feet fluorescent lamp foot-candles gears Gerard Swope glass horsecar horsepower horses idea illumination incandescent lamp inch increased installed invented Iron Lung kilowatts laboratory less light lines machine manufacturing measured mechanical ment miles modern motors operation passengers phototube plant pounds pressure problem production profits radio railroads rays refrigerator Ripley River Schenectady speed steam turbines steam-electric locomotive steel story streets subway supercharger switch Swope technological television Thomas Edison tion transformer transmission transportation tricity trolley turn United utility vacuum tube voltage volts wages Ward's Island water wheels welding wires workers writer York