20075-0000 Musée des arts et métiers-CNAM (Paris France)
Suggestions & Corrections
Type:
instrument
Dimension:
H.: 1,2; W.: 1,1; L.: 9,4; Mass: 20 g.
Component's data
Thematic group:
Instruments
Type:
instrument
Abstract:
Folding rule in ivory in seven hinged sections. Twenty-two units of lenght, divided into twelfths. Ten of these units = 26,5 cms. Therefore, the unit is the pouce. On the back various capital letters marked.