Cap of a Loadstone, with which it is armed at the
pole (for the sake of the virtue), and on the efficacy of the same.

Chap. 18. An armed Loadstone does not indue an excited piece of Iron with
greater vigour than an unarmed.

Chap. 19. Union with an armed Loadstone is stronger; hence greater weights
are raised; but the coition is not stronger, but generally weaker.

Chap. 20. An armed Loadstone raises an armed Loadstone, which also attracts
a third; which likewise happens, though the virtue in the first be somewhat
small.

Chap. 21. If Paper or any other Medium be interposed, an armed loadstone
raises no more than an unarmed one.

Chap. 22. That an armed Loadstone draws Iron no more than an unarmed one:
and that an armed one is more strongly united to iron is shown by means of
an armed loadstone and a polished Cylinder of iron.

Chap. 23. The Magnetick Force causes motion toward unity, and binds firmly
together bodies which are united.

Chap. 24. A piece of Iron placed within the Orbe of a Loadstone hangs
suspended in the air, if on account of some impediment it cannot approach
it.

Chap. 25. Exaltation of the power of the magnet.

Chap. 26. Why there should appear to be a greater love between iron &
loadstone, than between loadstone & loadstone, or between iron & iron, when
close to the loadstone, within its orbe of virtue.

Chap. 27. The Centre of the Magnetick Virtues in the earth is the centre of
the earth; and in a terrella is the centre of the stone.

Chap. 28. A Loadstone attracts magneticks not only to a fixed point or
pole, but to every part of a terrella save the aequinoctial zone.

Chap. 29. On Variety of Strength due to Quantity or Mass.

Chap. 30. The Shape and Mass of the Iron are of most importance in cases of
coition.

Chap. 31. On long and round stones.

Chap. 32. Certain Problems and Magnetick Experiments about the Coition, and
Separation, and regular Motion of Bodies magnetical.

Chap. 33. On the Varying Ratio of Strength, and of the Motion of coition,
within the orbe of virtue.

Chap. 34. Why a Loadstone should be stronger in its poles in a different
ratio; as well in the Northern regions as in the Southern.

Chap. 35. On a Perpetual Motion Machine, mentioned by authors, by means of
the attraction of a loadstone.

Chap. 36. How a more robust Loadstone may be recognized.

Chap. 37. Use of a Loadstone as it affects iron.

Chap. 38. On Cases of Attraction in other Bodies.

Ch