The 'Brical' British calculator, 1905.
Brical' adding machine in case with two bone styluses. Patented by H and M Dickinson, the 'Brical' was Britain's answer to the French circular 'Tronset' instrument and is a modification of it. It was designed to add sums of money from 1/2d to £500.
- Currently on display in:
- Mathematics
- Year made :
- 1900-1909
- Inventory number :
- 1909-166
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