A rare late 19th Century lacquered and oxidised brass Goniometer signed BOHM & WIEDEMANN MUNCHEN No21, the vertical circle with silvered scale and magnifier, the axis with tangent screw adjustment, the sample table arranged for rotation with three clamps on angled supports, (the vertical magnifier missing), the tapering pillar support on shaped base with level, cross bubble and two adjustable screws - 9½in. (24.1cm.)