[Chap. 8]. In what countries and districts iron originates.
[Chap. 9]. Iron ore attracts iron ore.
[Chap. 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.