Thomas Alva Edison (appears to be inside his laboratory)
PHOTO ID # 12334
ADDITIONAL INFORMATION - Curator Comment 2.14.2008
Photograph of Thomas Edison with an 'Edison Effect' bulb, in Building One, West Orange, N.J.
It has to date from the 1910s - the small lamp to the left would not have that envelope shape in the 20's and the one on the table next to his elbow is a Mazda B modified for experimental work. They were developed in 1910-11. The tips also went away around 1923. The one hanging from the ceiling looks like a typical c1915 Mazda B too.
Hal Wallace, Curator-NMAH Smithsonian