Knowledge Hub

In 1906 I demonstrated a bladeless turbine at 16,000 rpm; in 1910–1911 several of my bladeless turbine engines were tested at 100–5,000 hp at the Waterside Power Station in New York.

In 1893, speaking in St. Louis, at the Franklin Institute and to the National Electric Light Association, I told audiences that a system like mine could send signals or even power through the Earth to any distance.

In March 1901 J. P. Morgan put $150,000 into my plan for transatlantic wireless transmission in return for 51% of the resulting patents; I built the Wardenclyffe facility at Shoreham, New York, until the project halted in 1905.

In 1899 I set up an experimental station at Colorado Springs to study how low-pressure air conducts and to run much larger coils than my New York lab allowed, then published the findings in The Century Magazine in June 1900.

From 1894 I researched "invisible" radiant energy after noticing damaged film; in March 1896 I built a high-energy single-terminal vacuum tube powered by the Tesla coil and recorded the hazards of working with it.

In 1893 Edward Dean Adams asked me to assess every competing system for transmitting power from Niagara Falls. I advised two-phase AC; the contract went to Westinghouse on that advice.

Westinghouse branded its polyphase AC system the "Tesla Polyphase System" and won the bid to light the 1893 Chicago fair, showing the public that AC was safe, reliable and efficient at scale.

After 1890 I used high AC voltages from my Tesla coil to transmit power by inductive and capacitive coupling, and lit Geissler tubes and incandescent bulbs from across a stage in public demonstrations.