Cary Reflecting Protractor, London, circa 1800 - Lot 71

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  3. Cary Reflecting Protractor, London, circa 1800 - Lot 71
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Lot n° 71
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Estimation :
1000 - 2000 EUR
Cary Reflecting Protractor, London, circa 1800 - Lot 71
Cary Reflecting Protractor, London, circa 1800 A precision scientific instrument made of brass, marked “Cary London” and engraved with “Patent 314,” preserved in its original wooden case. This reflecting protractor, similar to sextant-type instruments, features a graduated arc with a vernier scale, a mirror-based optical sighting system, a movable alidade, and a finely gridded base plate. It was designed for measuring angles in surveying, land surveying, and navigation. The inside of the lid bears an old handwritten note reading “10.6.1887” accompanied by “£6,” likely related to a previous purchase or appraisal. Details: Period: early 19th century, Origin: London, England, Manufacturer: William Cary, Inscription: “Cary London,” Number: “Patent 314,” Materials: brass, glass, and wood, Case dimensions: 16.5 × 11 × 4.5 cm, Condition: signs of use and original patina; case and instrument preserved.
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