Inventory no. 43341 - Former Display Label
French SECTOR and PLUMB-LEVEL
c.1700
Silver. Signed, "Clerget A paris"; undated.
With scales for "Les Cordes", "Metaux", "Les parties Egales", "poligones", "poids des boulets", and "Calibre des piece [sic]".
When opened at right-angles, a plumb-line and bob may be suspended from the apex of the triangle so formed. On the cross-piece, which keeps in position the arms of the sector, are engraved a central dotted line and arrow for use in levelling the plumb-line.