Genaille–Lucas rulers

Genaille–Lucas rulers is a calculating tool or scientific instrument.

Also recorded as Genaille's rods.

Overview

Catalogue entries for instruments state maker, signature, completeness and working condition. VALÉORINE records this subject so that lots referring to it can be described consistently.

In detail

arithmetic tool

Sources

Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.

reference work · Reputable secondary · Wikipedia
“Genaille–Lucas rulers”, English Wikipedia, consulted as further reading
Consult the source
reference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3455860: Genaille–Lucas rulers
Consult the source