A calculating instrument with Napier's rods (7h 50min, nov 18, 2018 y – 20h 53min, jul 30, 2019 y)
Description:
In 1667 Sir Charles Cotterell, an English courtier and translator, devised a calculating instrument with Napier's rods, which included a wire-and-bead abacus for adding the partial products.Added to timeline:
Date:
7h 50min, nov 18, 2018 y
20h 53min, jul 30, 2019 y
~ 8 months