Hawkins Polygraph, 1803 is a photograph by Granger which was uploaded on June 30th, 2012.
Title
Hawkins Polygraph, 1803
Artist
Granger
Medium
Photograph - Digital Image
Description
HAWKINS' POLYGRAPH, 1803. John Isaac Hawkins' polygraph which he invented in 1803. Thomas Jefferson acquired the letter-copying device in 1804. Contemporary English line engraving.
Uploaded
June 30th, 2012
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