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2018-05-13 04:41:33
TAISNIER, Jean [PEREGRINUS, Peter; BENEDETTI, Giovanni Battista]
Opusculum perpetua memoria dignissimum, De natura magnetis, et eius effectibus .
Johann Birkmann, Cologne, 1562. First edition of this exceptionally rare, interesting, and notorious work - the second printed work on magnetism, preceded only by the Epistola de magnete of Peregrinus (1558) (which is virtually unobtainable). Taisnier's work, in fact, contains a plagiarism of Peregrinus, which it reprints verbatim, and of the equally rare Demonstratio proportionum motuum localium (1554) of Benedetti (1530-90), which anticipates Galileo's theory of falling bodies. But Taisnier's book also contains important original contributions, notably to navigation. It "had a section on the relation of hull shape to speed in ship design. Its most valuable contribution was a long dissertation upon the causes and sequence of tides . [it] marked a definite step forward in tidal theory" (Waters, pp. 150-151). "The Epistola ranks as one of the most impressive scientific treatises of the Middle Ages. Not only did Peregrinus bring together virtually all the relevant, contemporary knowledge on magnetism, he added to it and, of the greatest importance, organized the whole into a science of magnetism. He formulated rules for the determination of magnetic polarity, which then enabled him to enunciate rules for attraction and repulsion, all of which would today form the basis of an introductory lesson on magnetism. As the two magnetic compasses and perpetual motion devices for clock and wheel testify, Peregrinus was also seriously concerned with the practical application of magnetic force. The subsequent influence of his treatise was considerable. The existence of at least thirty-on … [Click Below for Full Description]
Bookseller: SOPHIA RARE BOOKS [Koebenhavn V, Denmark]
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