Napier's bones (1 янв 1617 г. – 20 ч 53 мин, 30 июл 2019 г.)
Описание:
Napier's bones are a manually-operated calculating device created by John Napier of Merchiston, Scotland for calculation of products and quotients of numbers. With a method based on lattice calculating. The rods looked like bones which is why it was called Napier’s bonesДобавлено на ленту времени:
Дата:
1 янв 1617 г.
20 ч 53 мин, 30 июл 2019 г.
~ 402 years