18th Century French Graphometer

Discover a piece of surveying history with this late 18th-century French graphometer. This precision instrument measures angles from 0° to 180° and calculates distances by means of triangulation. Perfect for determining positions of points or objects on land or at sea, it features a graduated semicircle with two alidades—one fixed and the other rotatable with sights.

Signed by Meurand Quai De L'Horloge Paris, and measuring 11 1/2 inches across the alidades.

Enhance your collection with this timeless artifact, reflecting fine French craftsmanship.

Dimensions: 11 1/2 inches across