10. Iron ore has poles, and acquires them, and settles itself toward
the poles of the universe.

Chap. 11. Wrought iron, not excited by a loadstone, draws iron.

Chap. 12. A long piece of Iron (even though not excited by a loadstone)
settles itself toward North & South.

Chap. 13. Wrought iron has in itself certain parts Boreal & Austral: a
magnetick vigour, verticity, and determinate vertices or poles.

Chap. 14. Concerning other powers of loadstone, & its medicinal properties.

Chap. 15. The medicinal virtue of iron.

Chap. 16. That loadstone & iron ore are the same, but iron an extract from
both, as other metals are from their own ores; & that all magnetick
virtues, though weaker, exist in the ore itself & in smelted iron.

Chap. 17. That the globe of the earth is magnetick, & a magnet; & how in
our hands the magnet stone has all the primary forces of the earth, while
the earth by the same powers remains constant in a fixed direction in the
universe.

_Book 2._

Chap. 1. On Magnetick Motions.

Chap. 2. On the Magnetick Coition, and first on the attraction of Amber, or
more truly, on the attaching of bodies to Amber.

Chap. 3. Opinions of others on Magnetick Coition, which they call
Attraction.

Chap. 4. On Magnetick Force & Form, what it is; and on the cause of the
Coition.

Chap. 5. How the Power dwells in the Loadstone.

Chap. 6. How magnetick pieces of Iron and smaller loadstones conform
themselves to a terrella & to the earth itself, and by them are disposed.

Chap. 7. On the Potency of the Magnetick Virtue, and on its nature capable
of spreading out into an orbe.

Chap. 8. On the geography of the Earth, and of the Terrella.

Chap. 9. On the Aequinoctial Circle of the Earth and of a Terrella.

Chap. 10. Magnetick Meridians of the Earth.

Chap. 11. Parallels.

{vij} Chap. 12. The Magnetick Horizon.

Chap. 13. On the Axis and Magnetick Poles.

Chap. 14. Why at the Pole itself the Coition is stronger than in the other
parts intermediate between the aequator and the pole; and on the proportion
of forces of the coition in various parts of the earth and of the terrella.

Chap. 15. The Magnetick Virtue which is conceived in Iron is more apparent
in an iron rod than in a piece of Iron that is round, square, or of other
figure.

Chap. 16. Showing that Movements take place by the Magnetical Vigour though
solid bodies lie between; and on the interposition of iron plates.

Chap. 17. On the Iron