folding rule and square
Date: 1733
Inventory Number: 5460
Classification: Rule-Folding
Subject:
Maker: Michel Cadot (1730 - 1753)
Cultural Region:
Place of Origin:
Dimensions:
0.2 x 17 x 17 cm (1/16 x 6 11/16 x 6 11/16 in.)
folded: 0.2 x 17 x 2 cm (1/16 x 6 11/16 x 13/16 in.)
Material:
Description:
One arm has two sets of scale units: "Demy Pied de Roy" and "Demy Pied du Rhin". the other arm has a diagonal scale for precision measurement. A hinge joins the two rulers together. There is also a cutout window to be used with a plumb line.
The instrument forms a square when open.
The instrument forms a square when open.
In Collection(s)
Signedon one arm: Cadot AParis 1733
FunctionSuch a ruler was used to make simple measurements and, with a pair of dividers, to convert results from one scale unit to another. Unfolded, this rule could serve as a set square. The plumb line was added for leveling purposes.