When Edison moved to Menlo Park, New Jersey, in spring of 1876 the laboratory building contained his entire operation -- a handful of collaborators, office, library, and machine shop as well as laboratory. As the scale of Edison's investigations grew so did the complex, but this building -- dedicated to experimental activities -- was always understood to be the heart of the enterprise.

This well-equipped laboratory enabled Edison to carry on his investigations even as he seemed to seek a break from business and other matters. The first building to be completed in Greenfield Village, it had a second experimental life, offering seclusion to a select group of Ford Motor Company engineers tasked with developing the Ford V-8 engine in the early 1930s.

The Menlo Park complex was an all-male environment; the closest workaday involvement of women -- not forgetting that Edison and several of his personnel were married -- was at the Sarah Jordan boardinghouse. Offering room and board for unmarried employees at the complex, it was operated by Sarah Jordan, a distant relative of Edison's. The house also played host to the experimental lighting system installed throughout Menlo Park in December 1879.

This building was built in late 1878 as Edison's work on electric lighting expanded. The first floor provided office space for accounting, bookkeeping, and patent applications; upstairs was a superbly stocked technical library. The building also played another key role: as a reception area for journalists and other visitors it provided a disarming first impression of Edison's success and ambition.

Originally built as a photographic studio and drafting room, the glassblowing shop was fundamental to Edison's enterprise. Edison's incandescent lighting experiments ensured that the laboratory had a voracious appetite for glass -- not only for bulbs but also for associated apparatus such as vacuum pumps. Ludwig Boehm, the laboratory's first master glassblower, worked here -- and lodged in the attic space.

The presence of a machine shop (and of foreman / head machinist John Kruesi) was fundamental to the success of Menlo Park. This well-equipped facility -- built to replace the small machine shop originally installed in the laboratory -- enabled Edison and his associates to not only rapidly prototype iterations of experimental devices but also facilitate their eventual, profitable manufacture.