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£42.0.0 This represents a past sale price of 42 pounds sterling written by a book dealer.
133 An inventory or catalog number.
6 leaves + 502 pages + 37 leaves 2 plates This is a collation note. It describes the physical makeup of the book. "Leaves" refers to the individual sheets of paper, which are distinct from numbered pages.A rectangular bookplate features a woodcut style illustration of a kneeling male figure, likely the Titan Atlas, supporting a large armillary sphere on his shoulders. The sphere is a model of objects in the sky. It consists of several intersecting rings with labels translated here from the original Latin: Solstitial colure, Meridian, Arctic Circle, Tropic of Cancer, Axis, Colure, Zodiac, Oblique horizon, Tropic of Capricorn, World axis, Equator, and Antarctic Circle. The figure is bearded, wearing a simple loincloth, and kneels on grassy ground with small plants.
£ 11 An earlier price mark, suggesting the book was once valued at 11 pounds.
Dibner Library: A major collection of rare books and manuscripts in the history of science, now part of the Smithsonian Institution.
Armillary sphere: A model of the celestial globe consisting of a spherical framework of rings. It represents the principal circles of the heavens.
Atlas: A figure from Greek mythology condemned to hold up the celestial heavens for eternity.