On the Magnet

CHAP. 1. The writings of the ancients and moderns on the magnet, and some things merely commemorated; various opinions and vanities.
Chap. 2. What kind of stone the magnet is, and of its discovery.
Chap. 3. The magnet has parts distinguished by natural power, and poles conspicuous by their virtue.
Chap. 4. Which pole of the stone is northern, and how it is distinguished from the southern.
Chap. 5. The magnet seems to attract a magnet in a natural position: but in an adverse one it repels, and reduces it to order.
Chap. 6. The magnet attracts iron ore just as it does iron itself when smelted and fused.
Chap. 7. What iron is, and from what matter, and its use.
Chap. 8. In which lands and regions iron is born.
Chap. 9. Iron ore attracts iron ore.
Chap. 10. Iron ore has poles, and acquires them, and disposes itself to the poles of the world.
Chap. 11. Fused iron, not excited by a magnet, attracts iron.
Chap. 12. Long iron disposes itself (even when not excited by a magnet) toward the North and South.
Chap. 13. Smelted iron has certain Northern and Southern parts in itself: magnetic vigor, verticity, and designated vertices, or poles.
Chap. 14. Of other powers of the magnet, and its medicinal property.
Chap. 15. The medicinal power of iron.
Chap. 16. That the magnet and iron ore are the same; but iron extracted from both is a certain something, as other metals are from their ores; and all magnetic virtues are in iron, both in the ore itself and in the smelted metal; but they are weaker.
Chap. 17. That the globe of the Earth is magnetic, and a magnet; and how among us a magnet stone has all the powers of the Earth; but the Earth consists in the world with a certain direction by the same powers.

Chap. 1. Of magnetic motions.
Chap. 2. Of magnetic coition, and first of the attraction of amber, or more truly the application of bodies to amber.
Chap. 3. Of magnetic coition, which they call attraction; the opinions of others.
Chap. 4. Of magnetic force and form, what it is, and of the cause of coition.
Chap. 5. How vigor is present in a magnet.
Chap. 6. How magnetic tools and smaller magnets conform themselves to the terrella, and to the Earth itself, and are disposed by them.
Chap. 7. Of the potentiality of magnetic virtue, and its nature to be extended into a sphere.
Chap. 8. Of the geography of the Earth and the terrella.
Chap. 9. Of the equinoctial circle of the Earth and the terrella.
Chap. 10. The magnetic meridians of the Earth.
Chap. 11. The parallels.