Polygrapher. P.78.

Photograph: David Remes (2003)

In 1778-79 Darwin continued his work on a copying machine and perfected a ‘polygrapher’ – a model working on the pantograph principle. It was able to duplicate writing and drawings, and produced an identical copy. In this variant the pen was not stiffened, and the height of the machine was reduced.


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3996-0Erasmus Darwin’s Commonplace Book 1088-0The Scope and Nature of Darwin’s Commonplace Book 1091-0Artificial bird. P.32, 38. 1099-0Bigrapher. P.53. 1108-0Canal lift. P.58-9. 1115-0Diving bell with washed air, pneumatic. P.61. 1117-0Polygrapher. P.78. 1124-0Electrical doubler. P.79. 1128-0Rocket motor. P.82.