'Hawkins's Machine for Writing, Drawing etc', 1825.
4 0 c m
actual image size: 22cm x 32cm

'Hawkins's Machine for Writing, Drawing etc', 1825.

Pas, J

© Science Museum / Science & Society Picture Library


Engraving by J Pas of a polygraph; apparatus for producing a simultaneous copy of a drawing or document. Its inventor, John Isaac Hawkins, received an American patent for it in 1803. A polygraph in modern usage means a device for recording physiological characteristics for use in lie detection. Illustration from 'Encyclopaedia Londinensis, or, Universal Dictionary of Arts, Sciences, and Literature' published in London, 1810-1829.



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