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Gilles-Louis Chrétien 
Physionotrace Machine 
1792 
  
Drawing 
Private collection of Jack and Beverly Wilgus 
 
LL/44215 
  
The physionotrace was a mechanical instrument invented by Gilles-Louis Chrétien in 1784. It was used to trace a profile portrait and using a pantograph reduce it and engrave it onto a copper plate. Multiple prints could then me made of the portrait.
 
A copy of this illustration is included in Raymond Lécuyer, 1945, Histoire de la photographie, (Paris: Baschet) where the source of the original is given as the Bibliothèque Nationale de France. 
 

 
  
 
  
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