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W. & T. GILBERT, CIRCA 1825
細節
AN ENGLISH THEODOLITE
W. & T. GILBERT, CIRCA 1825
the telescope engraved with the mark of the United East India Company, with bubble level underneath, rack and pinion focusing, supported with fine adjustment mechanism and silver graduated arc 90-0-90° with vernier, signed on 8-point compass rose W.&T. Gilbert, London with degree scale 0-360°, over central column revolving around silver degree scale with twin verniers and magnifying lenses, with bubble level, underneath a secondary telescope; with a wooden tripod with stamped markings to brass fittings FLAVELLE BRISBANE
13.5in. (34cm.) high
W. & T. GILBERT, CIRCA 1825
the telescope engraved with the mark of the United East India Company, with bubble level underneath, rack and pinion focusing, supported with fine adjustment mechanism and silver graduated arc 90-0-90° with vernier, signed on 8-point compass rose W.&T. Gilbert, London with degree scale 0-360°, over central column revolving around silver degree scale with twin verniers and magnifying lenses, with bubble level, underneath a secondary telescope; with a wooden tripod with stamped markings to brass fittings FLAVELLE BRISBANE
13.5in. (34cm.) high