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Attempt to make a tool with Napier's rodsple of a time span (7 ore 50 min, 18 nov 2018 anni – 20 ore 53 min, 30 lugl 2019 anni)

Descrizione:

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.

Aggiunto al nastro di tempo:

Data:

7 ore 50 min, 18 nov 2018 anni
20 ore 53 min, 30 lugl 2019 anni
~ 8 months