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2020-12-28 19:50:05
CABEO, Niccolò
Philosophia magnetica, in qua magnetis natura penitus explicatur, et omnium quae hoc lapide cernuntur, causae propriae afferuntur. Nova etiam pycis constrtuitur, quae propiam poli elevationem, sum suo meridiano, ubique demonstrat
Francesco Suzzi, Ferrara, 1629. UNIQUE PRE-PUBLICATION PRESENTATION COPY. First edition, a unique pre-publication presentation copy by Cabeo to his teacher Jacobo Corrado, of the first extensive study of magnetism since William Gilbert's De Magnete (1600). Corrado's name is handwritten on the title page, which is in an unfinished state, the coat-of-arms at the head having been left un-engraved; in addition, there is an eleven-line manuscript dedication on the second leaf, which is blank but usually contains the Privilege of the Emperor Charles V. In the dedication Cabeo thanks his teacher and praises him for his vast knowledge. "His first book, the Philosophia magnetica, discussed not only Gilbert's but also Cabeo's own experimental investigations of terrestrial magnetism as well as magnetized iron and 'lodestone' (the mineral magnetite). The central focus of his work, like Gilbert's before him, was therefore the study of the magnetic behaviors of compass needles. Where Gilbert, however, argued that the Earth itself is a giant magnet, whose poles reproduce the poles of an ordinary magnet and with which it interacts, Cabeo maintained instead that magnetic properties are inherent to certain sorts of matter; they did not subsist in their relationships to the great magnet, the Earth. Indeed, Cabeo denied that the Earth itself is a great magnet, even though it contains matter lending it magnetic effects. He also, again following Gilbert, discussed magnetic attraction between rubbed objects (typically, pieces of amber resin) and light objects such as bits of straw or paper; the a … [Click Below for Full Description]
Bookseller: SOPHIA RARE BOOKS [Koebenhavn V, Denmark]
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