Although Thomas A. Edison's house here has been destroyed, Menlo Park and the Edison Memorial Tower stand in tribute to the great American inventor. Here, on December 6, 1877, the 30-year-old Edison invented the phonograph. Two years later, he perfected the first practical incandescent light, designing and constructing various kinds of electrical equipment we now take for granted. His workshop has been moved to the Ford Museum in Dearborn, Michigan. Edison also built the first electric railway locomotive here in 1880; it ran 1 1/2 miles over the fields of Pumptown.