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T HARRIS & SON., MID-19TH CENTURY
细节
AN ENGLISH THEODOLITE
T Harris & Son., mid-19th century
the telescope with bubble level, supported on platform with vernier for arc 90-0-90° which is secured to the base with two screws, signed T HARRIS & Son. Opticians to his Majesty. London., the silvered 8-point compass rose with raised degree scale 0-90-0-90°, vernier to top of slanted plate with degree scale 0-360° beneath, in fitted wooden case.
11in. (28cm.) long in case
T Harris & Son., mid-19th century
the telescope with bubble level, supported on platform with vernier for arc 90-0-90° which is secured to the base with two screws, signed T HARRIS & Son. Opticians to his Majesty. London., the silvered 8-point compass rose with raised degree scale 0-90-0-90°, vernier to top of slanted plate with degree scale 0-360° beneath, in fitted wooden case.
11in. (28cm.) long in case