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Thomas Edison (11 Feb 1847 - 18 Oct 1931) American inventor who was known internationally as “the Wizard of Menlo Park,” for the huge number of innovations coming from there, the world's first industrial research laboratory. Short biography of Thomas Edison >>

Thomas Edison Quote - Tinfoil Phonograph
“Mary Had a Little Lamb”

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1877 (source)

“I was going to record talking, and then have the machine talk back. ... the foil was put on; I then shouted 'Mary had a little lamb', ... I adjusted the reproducer, and the machine reproduced it perfectly.”

— Thomas Edison

Describing the first recording he made on his tinfoil phonograph

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Thomas Edison and tinfoil phonograph
(probably 1878) (source)

Edison Valued His First Tinfoil Phonograph at $18

The condensed quote above comes from a longer description of his tin foil phonograph that Thomas Edison gave in his own account:

It is said that Carman, the foreman of the machine shop, had gone the length of wagering Edison a box of cigars that the device would not work. All the world knows that he lost.1

Edison had given his first plans to Kruesi in Dec 1877. In the posed photo, shown here, Edison was sitting with an improved machine. Note that in this photo, probably taken in 1878, Edison would have be about 30 years old. We are more familiar from the documentary movies seeing him as a much older man, but this photo instead shows him in his prime years.

This, his first major invention brought Edison international attention. Then, in 1879, just two years after drawing his phonograph plans, Edison was demonstrating his successful light bulb design.

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Nature bears long with those who wrong her. She is patient under abuse. But when abuse has gone too far, when the time of reckoning finally comes, she is equally slow to be appeased and to turn away her wrath. (1882) -- Nathaniel Egleston, who was writing then about deforestation, but speaks equally well about the danger of climate change today.

Carl Sagan: In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) ...(more by Sagan)

Albert Einstein: I used to wonder how it comes about that the electron is negative. Negative-positive—these are perfectly symmetric in physics. There is no reason whatever to prefer one to the other. Then why is the electron negative? I thought about this for a long time and at last all I could think was “It won the fight!” ...(more by Einstein)

Richard Feynman: It is the facts that matter, not the proofs. Physics can progress without the proofs, but we can't go on without the facts ... if the facts are right, then the proofs are a matter of playing around with the algebra correctly. ...(more by Feynman)

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