1Charges Advanced by George Nicholas, with Jefferson’s Answers, [after 31 July 1781] (Jefferson Papers)
...in TJ’s hand, one of which is a polygraph copy of the other; these are identical in...
2To Thomas Jefferson from Burgess Allison, 1 March 1801 (Jefferson Papers)
...improvement of machines, among them the polygraph, physiognotrace, and paper ruling machine...
3From Thomas Jefferson to John Isaac Hawkins, 13 April 1802 (Jefferson Papers)
...machine, trifocal glasses, physiognotrace, and polygraph. In May 1803, before returning...
4To Thomas Jefferson from Charles Willson Peale, 10 January 1803 (Jefferson Papers)
...-pen copying device that he called the polygraph. Hawkins was afraid that someone might steal...
5To Thomas Jefferson from Charles Willson Peale, 28 January 1803 (Jefferson Papers)
His invention of the Polygraph, appears to me to possess many advantages over the...
6To Thomas Jefferson from Charles Willson Peale, 17 July 1803 (Jefferson Papers)
machine was the polygraph. Peale
7To Thomas Jefferson from Charles Willson Peale, 2 September 1803 (Jefferson Papers)
...’s museum, Bonaparte became interested in the polygraph and decided to obtain one of the...
8To Thomas Jefferson from Benjamin H. Latrobe, 2 October 1803 (Jefferson Papers)
I write this letter with Mr Peale’s polygraph,—a machine the most useful that has, I believe...
9From Thomas Jefferson to the Senate and the House of Representatives, 22 February 1804 (Jefferson Papers)
...was TJ’s first recorded use of the polygraph machine invented by John Isaac Hawkins, who...
10From Thomas Jefferson to Benjamin H. Latrobe, 26 February 1804 (Jefferson Papers)
modified the polygraph, or duplicate writing machine, by screwing thick wire into...