October 22, 1879

Thomas Edison: “I am Busily Engaged on the Electric Light”

Autograph Letter Signed
1 page
SMC 298
The Wizard of Menlo Park says that he hasn’t finished inventing the megaphone and cannot say when he will because he is “busily engaged on the electric light.”

In a marvelous coincidence, on October 22, 1879, a bulb with a fragile filament of carbonized thread glowed at Menlo Park for the very first time.
Autograph Letter Signed (“T.A. Edison”), 1 page, octavo, Menlo Park, New Jersey, October 22, 1879. To Eleanor Hallowell Stroud.
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