Russian Abacus (14h 39min, nov 21, 2018 y – 14h 49min, jul 1, 2019 y)
Description:
The Russian abacus is also called a schoty. It came into use in the 1600s and little is known about how it came to be. It was specifically designed for counting rubles and kopeks.Thee design uses a set of framed rods and a series of beads that are moved back and forth across the rods to conduct the count.
Added to timeline:
Date:
14h 39min, nov 21, 2018 y
14h 49min, jul 1, 2019 y
~ 7 months