Ciphering apparatus
- Made:
- 1833
Ciphering Apparatus by J Tyrrell, patented 1830, (apparatus for teaching basic arithmetic) (B507; A242624)
Details
- Category:
- Mathematics
- Collection:
- Sir Henry Wellcome's Museum Collection
- Object Number:
- 1980-1140
- Measurements:
-
Closed Box: 60 mm x 250 mm x 160 mm, 1 kg
- type:
- cipher demonstrators
- credit:
- On loan from the Wellcome Trust