This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Rees's Cyclopaedia Polygraph. en Detail of figure labelled Hawkin's patent Polygraph Engraving of John Hawkin's polygraph used for producing duplicates of writing For explanatory text see entry on COPYING volume of the Cyclopdia Rees's Cyclopdia Plates Vol III Miscellany Plate III Fig from digital scan at org Delineator Creator