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Polygraph. Hawkins's machine for writing, drawing &c. / J. Pass sc.
Print shows a duplicating device, or polygraph, for simultaneously producing two copies of a handwritten document. (DLC/PP-2001:068) Forms part of: Marian S. Carson collection at the Library of Congress.
Thomas Jefferson to Virginia General Assembly, February 16, 1809, Poly...
Polygraph Copy Public domain scan of Thomas Jefferson correspondence, American history, free to use, no copyright restrictions image - Picryl description.
Thomas Jefferson to Virginia General Assembly, February 16, 1809, Poly...
Polygraph Copy Public domain scan of Thomas Jefferson correspondence, American history, free to use, no copyright restrictions image - Picryl description.