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2020-09-23 14:14:38
BLAEU, Willem
Institution Astronomique de l’usage des globes et spheres...
Amsterdam,: Joan and Cornelis Blaeu,, 1652. 1642. 4to. (205 by 160mm), [9] ff. 277pp., numerous diagrams and woodcut illustrations within text, contemporary marginalia to title and a few leaves, some light dampstaining, final leaf with lower part cut off, contemporary vellum, title in manuscript to spine. Scarce first French edition of the great cartographer’s handbook to his famous globes and spheres, published by his sons Joan and Cornelis. The master globe-maker, who had recently produced the largest globes in the world to date (68 cm in diameter), authored the Institution Astronomique so that his customers might get the most out of their celestial and terrestrial globes. Blaeu gives a detailed explanation of the various parts of a globe, followed by a series of nearly 150 exercises. By positioning your terrestrial globe as Blaeu directs, it is a simple matter to determine the time in different parts of the world, or to ascertain the length of a day in your hometown of Amsterdam at any given season. There are exercises for both the celestial sphere concerning the ascendancy of certain constellations and the terrestrial globe locating a town in Indonesia given its coordinates or utilising rhumb lines to learn about navigation. The Institution Astronomique is divided into two parts, the first following the improper hypothesis of Ptolemy, the second following the true Copernican hypothesis, similar in arrangement to Galileo’s Dialogo. Blaeu explains that he devotes a great many pages to the Ptolemaic system only because it is simpler for neophyte astronomers to grasp … [Click Below for Full Description]
Bookseller: Daniel Crouch Rare Books [United Kingdom]
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