1893: Niagara Contract Awarded

Westinghouse A.C. switchboard used to power the fairgrounds.

February 24th, 1893: Tesla Lectures In Philadelphia

"On Light and Other High Frequency Phenomena" lecture is given before the Franklin Institute of Philadelphia.

Westinghouse generating equipment used to power trolleys.

March 1st, 1893: Tesla Lectures In St. Louis

"On Light and Other High Frequency Phenomena" lecture is given before the National Electric Light Association in St. Louis, Missouri.

Primary Westinghouse A.C. polyphase generator used to power the fair.

May 1st, 1893: Columbian Exposition

n 1892 George Westinghouse won the contract to power the Columbian Exposition. The Westinghouse company, with Tesla's guidance, built a power system for the exposition that produced three times more energy than was being utilized by the entire remainder of Chicago.

An admission ticket to the Columbian Exposition.

Tesla had a large display including phosphorescent lighting (a precursor to fluorescent lamps) powered without wires by high-frequency fields and the Egg of Columbus. The success of the Tesla Polyphase System installed at the exposition ensured Westinghouse would be selected to harness Niagara.

Tesla's display at the Columbian Exposition.

The original Franklin Institute of Philadelphia.

August 25th, 1893: Tesla Lectures In Chicago

"Mechanical and Electrical Oscillators" lecture is given before the members of the International Electrical Congress at the Columbian Exposition in Chicago, Illinois.

The Westinghouse (Sawyer-Man) "stopper lamp."

October 24th, 1893: Niagara Contract Awarded

Westinghouse is awarded the initial Niagara Falls contract signifying the end of "The War of the Currents."

The "Electricity Hall" of the Columbian Exposition.

The spectacular "City of Light" at the Columbian Exposition. — The "Electricity Hall" of the Columbian Exposition.