stchety (Russian form of Abacus), early 20th century.
The stchety (pronounced tch-o-ty) has horizontal rows of beads rather than vertical as in the Japanese abacus. It is specifically for counting rubles and kopeks. The lower three rows are for the kopeks. The rest position is with all the beads to the right.
Details
- Category:
- Mathematics
- Object Number:
- 1927-912
- Materials:
- mahogany (wood) and steel (metal)
- Measurements:
-
Overall: 360 mm x 240 mm x 58 mm, 0.84 kg
- type:
- abacus (russian)
- credit:
- Professor S.F. Ivanov