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Buy this image as a print
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Science Museum Group Collection
© The Board of Trustees of the Science Museum
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Roth's calculating machine, invented and patented by D.J. Wertheimber in 1843, English currency version,
Didier Roth returned to the basic design of Blaise Pascal for this simple stylus-operated adding machine. It did not receive much interest. This particular example is modified to add English currency.
Details
- Category:
- Mathematics
- Object Number:
- 1917-13
- Materials:
- mahogany (wood), brass (copper, zinc alloy) and bone
- Measurements:
-
overall: 30 mm x 410 mm x 65 mm, 1.01 kg
- type:
- adding machines
- credit:
- Court, Thomas Henry
