Wollaston type goniometer, Pixii, Paris

Pixii, Paris
Wollaston type goniometer (brass) with engraved scale (0.5 degree) and vernier read-out with twin adjusting wheels and fine adjustment. Diameter circle 11.2 cm.
Signed on circle "Pixii, Rue du Jardinet N°. 2 à Paris", first half 19th century

private collection