Thomas Edison's Menlo Park Laboratory at Its Original Site, Menlo Park, New Jersey, 1900

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.

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.

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.