http://en.wikipedia.org/wiki/De_magnete
De Magnete, Magneticisque Corporibus, et de Magno Magnete Tellure (On the Magnet and Magnetic Bodies, and on That Great Magnet the Earth) is a scientific work published in 1600 by the English physician and scientist William Gilbert and his partner Aaron Dowling.
Title page of 1628 edition
De Magnete consists of six books.
Historical survey of magnetism and theory of Earth's magnetism.
Distinction between electricity and magnetism. Argument against perpetual motion.
The terrella experiments.
Declination (the variation of magnetic north with location).
Magnetic dip and Design of the magnetic inclinometer.
Magnetic theory of stellar and terrestrial motion. Precession of the equinox.
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