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2020-10-13 17:30:14
COVENS, Cornelis.
Manual for the use and construction of a totally new pair of globes
Handleiding tot de kennis en het gebruik der hemel- en aard-globen, bevattende tevens de beschryving van de constructie, en het gebruik van eene geheel nieuwe aard-globe ...Amsterdam, Mortier, Covens and son, 1802. Large 8vo. With 8 printed tables and 14 folding engraved plates, each with several schematic figures of terrestrial and celestial globes, astronomical diagrams, planetary motion, problems with mounting, etc. Contemporary half calf. XXIV, 415, 20, [16] pp. First and only edition of a manual for the construction and use of an innovative type of terrestrial globe by Cornelis Covens (1764-1825), a member of the well-known Amsterdam Covens family of publishers, mapmakers and cartographers. In 1802 the Amsterdam map maker Cornelis Covens (1764-1825) had published a 12-inch terrestrial globe with a new construction. By means of a complex mounting with numerous brass rings Covens designed this Copernican globe - inspired by one brought out by the English instrument maker George Adams senior (1704-1772) - to show the real movement of the earth and other related phenomena. Initially Covens didn't intend to make a new construction for his celestial globe, because in his opinion the common celestial globe sufficiently shows the apparent movement of the sky. The Leiden professor Jacob de Gelder (1765-1848), however, didn't agree with him. According to De Gelder, the ideal celestial globe was one that could be adjusted to an arbitrary "epoch". He therefore advised Covens to make a "new" celestial globe as well. Shortly afterwards Covens indeed designed a precession globe , whi … [Click Below for Full Description]
Bookseller: ASHER RARE BOOKS [Utrecht, The Netherlands]

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