Wollaston goniometer

Deyrolle, Paris
Wollaston type goniometer (lacquered brass and blackened base) with engraved scale and vernier read-out with twin adjusting wheels and fine adjustment. The mirror is missing on this instrument. Diameter circle 11 cm, height 19 cm.
Signed "Deyrolle | Paris", second half 19th century.

collection Roger Warin