// todo need optimize like in event.jsp. Add indexing or not indexing this page. Cylindrical slide rule (1 janv. 1891 – 14 h 49 min, 1 juill. 2019 ans) (La bande de temps)
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Cylindrical slide rule (1 janv. 1891 – 14 h 49 min, 1 juill. 2019 ans)

Description:

Edwin Thacher introduced a cylindrical slide rule in the United States.

Ajouté au bande de temps:

Counting/Caculating Inventions

ByEmily Stark
4 nov. 2019

Date:

1 janv. 1891
14 h 49 min, 1 juill. 2019 ans
~ 128 years
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