Polygraph
Polygraph
Jan 24, 2008
monticello.org
18 reactions | Considered the first step into the world of modern...
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6.3K views · 368 reactions | Happy #HandwritingDay! Thomas Jefferson wrote roughly 19,000 letters during his lifetime and used this device, the polygraph, to create copies of his correspondence. The polygraph worked by having the writer's hand move one pen while a second pen mirrored its movements. The result was a copy strikingly like the handwritten original. Learn more in this video  | Thomas Jefferson's Monticello | Facebook
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6.3K views · 368 reactions | Happy #HandwritingDay! Thomas Jeffers…
6.4K views2 weeks ago
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The Polygraph: The Proto-Photocopy Machine Machine Invented in 1803 That Changed Thomas Jefferson’s Life
The Polygraph: The Proto-Photocopy Machine Machine Inve…
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35K views · 450 reactions | In the latest episode of our #PHOMO tut…
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The FBI and other agencies are using polygraphs to find leakers. But do they work?
The FBI and other agencies are using polygraphs to find leakers. …
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