Edison found his role as inventor transitioning to one as industrialist and business manager.He eventually became embroiled in a longstanding rivalry with Nikola Tesla, an engineering visionary with academic training who worked with Edison's company for a time, parting ways in 1885 One of the most infamous of these shows was the 1903 electrocution of a circus elephant named Topsy in New York's Coney Island.During the 1890s, he built a magnetic iron-ore processing plant in northern New Jersey that proved to be a commercial failure. Later, he was able to salvage the process into a better method for producing cement. On April 23, 1896, Edison became the first person to project a motion picture, holding the world's first motion picture screening at Koster & Bial's Music Hall in New York City. Though the gasoline-powered engine eventually prevailed, Edison designed a battery for the self-starter on the Model T for friend and admirer Henry Ford in 1912. During World War I, the U.S. government asked Thomas Edison to head the Naval Consulting Board, which examined inventions submitted for military use.