A War Won
While in Paris, Tesla learned of his mother's serious illness and left for Gospic; he was able to be with her during her final weeks of life. He was treated as a national hero while in his homeland. A severe illness he suffered while in Serbia prompted Tesla to self-examination and a resolution to avoid all further distractions and concentrate on his experimentation. He returned to New York, resumed his solitary lifestyle, and restarted his investigations of electricity's promise.
In May, 1893, The Columbian Exhibition opened in Chicago with illumination inside and out supplied by the Westinghouse Company using Tesla technologies. The Westinghouse installation was "outshining" Edison's lighting efforts and Tesla supplied a spectacular personal rebuttal to Edison's claim that AC current was by nature too dangerous for everyday use.
Since Tesla's first introduction of AC electricity, the "War of Electric Currents" had been waged, with Edison insisting on the safety of DC current over AC current. The safeness in fact came from the minimal strength of the direct current.
Now Tesla disproved that claim by letting a charge of one million volts be passed through his body without harm. Alternating current had won the "War."
Westinghouse also used the Tesla polyphase system in harnessing the power of Niagara Falls to produce 37,300 kilowatts electrical output from ten generators and transmit it to Buffalo, which was twenty-two miles away. The system went online in August, 1895.