Rhabdological abacus, in case. Invented by H. Goodwyn, 1822. With manuscript description by Olinthus Gregory (RAS No.89). Presented to the Royal Astronomical Society in 1824 by Goodwyn family.
Details
- Category:
- Mathematics
- Object Number:
- 1931-341
- type:
- abacus
- credit:
- Royal Astronomical Society