Contact goniometer with fixed limbs
Contact goniometer with fixed limbs (silver and blued
steel, outside diameter 7.5 cm) signed "Vinçard
Arnould Carangeot (1742-1806) commissioned Nicolas Vinçard
(1741-1788) to construct his first contact goniometer,
in 1782. Vinçard produced them in brass and in
silver. This instrument must be dated 1782-1788.