- AC: reverses several times at intervals (hundreds of thousands of volts) -DC: unidirectional flow (hundreds of volts) -Nikola Tesla vs. Thomas Jefferson (AC vs. DC) -Chicago World's Fair in 1893 vs. stray animal electrocutions -First hydroelectric system at NF, Wardenclyffe (AKA Tesla Tower) in Long Island, NY -1901-1902, abandoner in 1906, scrap in 1917, foreclosure in 1922, 50 years photography, 2013 museum. -wireless power transmission, to transmit messages and images to England across Atlantic |