Two late 18th-Century/early 19th-Century English Martin-type orrery attachments
Two late 18th-Century/early 19th-Century English Martin-type orrery attachments, a lunarium and a tellurion, the former with no moon ball, the mount with gears to a central column surrounded by a tilting silvered-brass angle-of-orbit ring, variously graduated and a fixed silvered-brass ring engraved PERIGEE and APOGEE , over a silvered combined calendar/Zodiac scale within a lunar month scale, mounted on a brass arm with gearing beneath and mounting aperture at the opposite end; the tellurion with a 3-inch diameter LANE'S Pocket GLOBE LONDON 1815 , mounted in a graduated silvered-brass meridian circle with pointers for the equator and tropics circles and a fixed half-horizon, mounted at the angle of the ecliptic beneath a twilight indicator and over various gears on the end of the brass mounting arm with mounting aperture at the other end and central silvered-brass hour dial with blued-steel needle (2)
Two late 18th-Century/early 19th-Century English Martin-type orrery attachments
Two late 18th-Century/early 19th-Century English Martin-type orrery attachments, a lunarium and a tellurion, the former with no moon ball, the mount with gears to a central column surrounded by a tilting silvered-brass angle-of-orbit ring, variously graduated and a fixed silvered-brass ring engraved PERIGEE and APOGEE , over a silvered combined calendar/Zodiac scale within a lunar month scale, mounted on a brass arm with gearing beneath and mounting aperture at the opposite end; the tellurion with a 3-inch diameter LANE'S Pocket GLOBE LONDON 1815 , mounted in a graduated silvered-brass meridian circle with pointers for the equator and tropics circles and a fixed half-horizon, mounted at the angle of the ecliptic beneath a twilight indicator and over various gears on the end of the brass mounting arm with mounting aperture at the other end and central silvered-brass hour dial with blued-steel needle (2)
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
