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Automatic calculator; Chambon's "Tachypoly plasiasme" length 9 5/8 inches
'Tachypoly Plasiasme' ready reckoner, 1880-1884. Invented by C L Chambon in 1880, the 'Tachypoly plasiasme' ready reckoner showed multiplication tables up to 100 times 100.
Details
- Category:
- Mathematics
- Object Number:
- 1884-4
- Materials:
- wood (unidentified), paper (fibre product) and metal (unknown)
- Measurements:
-
overall (flat): 20 mm x 40 mm x 260 mm, 0.08 kg
- type:
- ready reckoner
- credit:
- Mr C.L. Chambon
