s acquired powers from the loadstone.

Magnetick Versorium, a piece of iron upon a pin, excited by a loadstone.

Non-magnetick Versorium, a versorium of any metal, serving for electrical
experiments.

Capped loadstone, which is furnished with an iron cap, or snout.

Meridionally, that is, along the projection of the meridian.

Paralleletically, that is, along the projection of a parallel.

Cusp, tip of a versorium excited by the loadstone.

Cross, sometimes used of the end that has not been touched and excited by a
loadstone, though in many instruments both ends are excited by the
appropriate termini of the stone.

Cork, that is, bark of the cork-oak.

Radius of the Orbe of the Loadstone, is a straight line drawn from the
summit of the orbe of the loadstone, by the shortest way, to the surface of
the body, which, continued, will pass through the centre of the loadstone.

Orbe of Virtue, is all that space through which the Virtue of any loadstone
extends.

Orbe of Coition, is all that space through which the smallest magnetick is
moved by the loadstone.

Proof, for a demonstration shown by means of a body.

Magnetick Coition: since in magnetick bodies, motion does not occur by an
attractive faculty, but by a concourse or concordance of both, not as if
there were an [Greek: helktike dunamis] of one only, but a [Greek:
sundrome] of both; there is always a coition of the vigour: and even of the
body if its mass should not obstruct.

Declinatorium, a piece of Iron capable of turning about an axis, excited by
a loadstone, in a declination instrument.

* * * * *

INDEX OF CHAPTERS.

_Book 1._

Chap. 1. Ancient and modern writings on the Loadstone, with certain matters
of mention only, various opinions, & vanities.

Chap. 2. Magnet Stone, of what kind it is, and its discovery.

Chap. 3. The loadstone has parts distinct in their natural power, & poles
conspicuous for their property.

Chap. 4. Which pole of the stone is the Boreal: and how it is distinguished
from the austral.

Chap. 5. Loadstone seems to attract loadstone when in natural position: but
repels it when in a contrary one, and brings it back to order.

Chap. 6. Loadstone attracts the ore of iron, as well as iron proper,
smelted & wrought.

Chap. 7. What iron is, and of what substance, and its uses.

Chap. 8. In what countries and districts iron originates.

Chap. 9. Iron ore attracts iron ore.

Chap.