Wollaston type goniometer

unsigned
Wollaston type goniometer (lacquered brass and blackened base) with engraved scale and vernier read-out with twin adjusting wheels and fine adjustment. Diameter circle: 11 cm, height: 19 cm
Unsigned. A similar instrument (the mirror is missing) present in the VMHM collection is signed "Deyrolle | Paris", end 19th century.

private collection