A REGENCY ARMILLARY SPHERE
拍品 15

A REGENCY ARMILLARY SPHERE

MADE IN LONDON, CIRCA 1800

已结束2018年7月10日

成交价

GBP 50,000

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A REGENCY ARMILLARY SPHERE
MADE IN LONDON, CIRCA 1800
The 12-inch brass armillary sphere composed of ecliptic engraved with scales for calendar and zodiac, equator 0-360° and I-XXIV, rings labelled for Arctic Circle, Tropic of Cancer, Tropic of Capricorn, Antarctic Circle, two colures each engraved 0-90°-90°, at north celestial pole two dials rotate brass arms carrying a brass solar sphere and ivory lunar sphere, at the southern pole two dials rotate the entire armillary and central Earth axis with hour pointer to circle engraved on the inside 1-12-1-12, the 3-inch terrestrial comprised of twelve hand-coloured gores and two calottes, cartouche A NEW Terrestrial GLOBE by J. Newton 1800, supported in brass meridian engraved 0-90°-90°, with adjustable horizon ring 0-90°-90° and 8-point compass rose, the stand with adjustment arc 0-90° on tapering column with folding tripod feet.

25in. (63.5cm.) high

专家说明

The armillary is in the style of that described by George Adams (1709-1772) in his Astronomical and Geographical Essays (London: 1766). If it were made by him, or his sons George (1750-1795) and Dudley (1762-1830) then one might expect the interior globe to carry the Adams name. A likely candidate for the maker of this instrument is the firm W. & S. Jones (1791-1859) who used globes by other London makers on their New Portable Orrery. Their catalogue of 1808 listing instruments "removed from their old shop, No. 135 [Holborn]" lists armillary spheres of 12-inch diameter for 13 guineas; but by 1812 when they reissue Adams' Essays, having bought the copyright to Adam's works from his widow, they no longer sell such instruments.