Details
An oxidised-brass transit theodolite,
signed on the silvered dial F. ROBSON & CO., NEWCASTLE ON TYNE, the telescope with rack and pinion focusing, graduated bubble level, lens hood and four cross-wire adjusters, the axis supported on twin A-frames, with a 6in. vertical circle, the silvered scale divided in four quadrants, with twin verniers and magnifiers, tangent-screw fine adjustment and clamp, the compass box with edge-bar needle and jewelled cap and needle clamp, with level and cross bubble over the enclosed chamfered silver horizontal circle with twin verniers and magnifers, and similar fine adjustment, on four-screw tripod attachment, in fitted mahogany case -- 15¼in. (38.7cm.) wide
See Illustration
signed on the silvered dial F. ROBSON & CO., NEWCASTLE ON TYNE, the telescope with rack and pinion focusing, graduated bubble level, lens hood and four cross-wire adjusters, the axis supported on twin A-frames, with a 6in. vertical circle, the silvered scale divided in four quadrants, with twin verniers and magnifiers, tangent-screw fine adjustment and clamp, the compass box with edge-bar needle and jewelled cap and needle clamp, with level and cross bubble over the enclosed chamfered silver horizontal circle with twin verniers and magnifers, and similar fine adjustment, on four-screw tripod attachment, in fitted mahogany case -- 15¼in. (38.7cm.) wide
See Illustration