On the magnet, magnetick bodies also, and on the great magnet the earth / a new physiology, demonstrated by many arguments & experiments

by Unknown

[Chap. 20]. Variation in the Eastern Ocean.

[Chap. 21]. How the deviation of the versorium is augmented and diminished by reason of the distance of places.

Book 5.

[Chap. 1]. On Declination.

[Chap. 2]. Diagram of declinations of the magnetick needle, when excited, in the various positions of the sphere, and horizons of the earth, in which there is no variation of the declination.

[Chap. 3]. An indicatory instrument, showing by the virtue of a stone the degrees of declination from the horizon of each several latitude.

[Chap. 4]. Concerning the length of a versorium convenient for declination on a terrella.

[Chap. 5]. That declination does not arise from the attraction of the loadstone, but from a disposing and rotating influence.

[Chap. 6]. On the proportion of declination to latitude, and the cause of it.

[Chap. 7]. Explanation of the diagram of the rotation of a magnetick needle.