Abacus for the Reduction of English Measures to the Metric System and Vice Versa
Description:
This report presents a description of an abacus with three scales: one for English measures, one for metric measures, and one with the "points of reduction", as well as construction details. There is also a detailed description on how to use the abacus.
Date:
July 1921
Creator:
Tenani, Mario
Item Type:
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