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Attempt to make a tool with Napier's rodsple of a time span (7 ч 50 мин, 18 ноя 2018 г. – 20 ч 53 мин, 30 июл 2019 г.)

Описание:

In the early 1650s, Pierre Petit , a King Counsellor and Intendant des Fortifications made an attempt to make a tool with Napier's rods. Petit placed paper strips with Napier's rods and made a mechanism, the so called Arithmetical Cylinder or Tambour de Petit allowing the paper strips to be moved along the axes.

Добавлено на ленту времени:

Дата:

7 ч 50 мин, 18 ноя 2018 г.
20 ч 53 мин, 30 июл 2019 г.
~ 8 months