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AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
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A calculating instrument with Napier's rods (7 h 50 m, 18 nov 2018 año – 20 h 53 m, 30 jul 2019 año)

Descripción:

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.

Añadido al timeline:

Counting/Caculating Inventions

ByEmily Stark
4 nov 2019
0
0
360

fecha:

7 h 50 m, 18 nov 2018 año
20 h 53 m, 30 jul 2019 año
~ 8 months
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