细节
A black-painted and lacquered-brass transit theodolite,
by Elliott Brothers London No. 451, the telescope with rack and pinion focusing, lens cap and adjustable eyepiece, the axis mounted on twin A-frame supports incorporating a bubble level and tangent screw fine adjustment with clamp, mounted on the horizontal plate with compass, with silvered scale and edge-bar needle, with graduated cross-bubble, twin folding magnifiers (one lacking), with chamfered silvered scale and twin verniers, on three-screw tripod attachment -- 11¾in. (29.8cm.) high overall
See Illustration (Front Cover)
by Elliott Brothers London No. 451, the telescope with rack and pinion focusing, lens cap and adjustable eyepiece, the axis mounted on twin A-frame supports incorporating a bubble level and tangent screw fine adjustment with clamp, mounted on the horizontal plate with compass, with silvered scale and edge-bar needle, with graduated cross-bubble, twin folding magnifiers (one lacking), with chamfered silvered scale and twin verniers, on three-screw tripod attachment -- 11¾in. (29.8cm.) high overall
See Illustration (Front Cover)