Thomas Edison the recordings could be played only a few times, the phonograph made Edison a celebrity. Joseph Henry, president of the National Academy of Sciences and one of the most renowned electrical scientists in the US, described Edison as "the most ingenious inventor in this country... or in any other". In April 1878, Edison traveled to Washington to demonstrate the phonograph before the National Academy of Sciences, Congressmen, Senators and US President Hayes. The "Washington Post" described Edison as a "genius" and his presentation as "a scene... that will live in history". Although Edison obtained a patent for the phonograph in
Edison Machine Works location used as GE's headquarters for many years thereafter. Notable employees included: Edison Machine Works The Edison Machine Works was a manufacturing company set up to produce dynamos, large electric motors, and other components of the electrical illumination system being built by Thomas A. Edison in New York City. The need for equipment in the development of a large scale electric illumination "utility" in New York City, starting around 1880, soon outstripped the capacity of Thomas Edison's machine shop at Menlo Park. To alleviate the problem in 1881 Edison leased the old Etna Iron Works on Goerck Street, lower Manhattan