ruler
ruler is a metrological mechanism or stationery.
Also recorded as rule; line gauge; tape measure.
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
tool used to draw or measure distances along a straight line
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
“Ruler”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q104555: ruler
Consult the source