Blower designed by Tesla, manufactured by the American and British Manufacturing Company, and sold to the Corliss Steam Engine Works foundry in Providence, R.I., placed into service November 1909. "The blower is driven by a 75 HP #8-B 'HF' frame motor, three-phase, 220 volts, 60 cycle, 2-pole, with starter." (From Westinghouse letter dated June 28, 1909.) The machine operated at approximately 3,400 RPM.