All sorts of Metals, in my opinion, are of some sorts of Circular Motions; but not like that sort, that is Water: for, the Water-Circle doth extend outward, from the Center; whereas, in my opinion, the Circular Motion of Metal, draws inward, from the Circumference. Also, in my opinion, the Circular Motions are dense, flat, edged, even, and smooth; for, all Bright and Glassie Bodies are smooth: and, though Edges are wounding Figures; yet, Edges are rather of the Nature of a Line, than of a Point. Again, all Motions that tend to a Center, are more fixt than those that extend to a Circumference: but, it is according to the degree of their Extensions, that those Creatures are more or less fixt; which is the cause that some sorts of Metals are more fixt than others; and that causes Gold to be the most fixt of all other sorts of Metals; and seems to be too strong for the Effects of Fire. But this is to be noted, That some Metals are more near related to some sort, than other: as for example, There is no Lead, without some Silver; so that Silver seems to be but a well-digested Lead. And certainly, Copper hath some near relation to Gold, although not so near related, as Lead is to Silver.
[CHAP. II. Of the Melting of Metals.]
Metals may be occasioned, by Fire, to slack their Retentive Motions, by which they become fluid; and as soon as they are quit of their Enemy, Fire, the Figurative Motions of Metal return to their proper Order: and this is the reason that occasions Metal to melt, which is, to flow: but yet, the Flowing Motion is but like the Exterior, and not the Innate actions of: for, the Melting actions do not alter the Innate actions; that is, they do not alter from the Nature of being Metal: but, if the Exterior Nature be occasioned, by the Excess of those Exterior actions, to alter their Retentive actions, then Metal turns to that we name Dross; and as much as Metal loses of its weight, so much of the Metal dissolves; that is, so much of those Innate motions are quite altered: but, Gold hath such an Innate Retentiveness, that though Fire may cause an extream alteration of the Exterior actions; yet, it cannot alter the Interior motions. The like is of Quick-silver. And yet Gold is not a God, to be Unalterable, though man knows not the way, and Fire has not the power to alter the Innate Nature of Gold.
[CHAP. III. Of Burning, Melting, Boyling, and Evaporating.]
Burning, Melting, Boyling, and Evaporating, are, for the most part, occasioned by Fire, or somewhat that is, in effect, Hot: I say, occasioned, by reason they are not the actions of Fire, but the actions of those Bodies that melts, boyls, evaporates, or burns; which being near, or joyned to Fire, are occasioned so to do: as for example, Put several sorts of Creatures, or Things, into a Fire, and they shall not burn alike: for, Leather and Metal do not burn alike; for Metal flows, and Leather shrinks up, and Water evaporates, and Wood converts it self, as it were, into Fire; which other things do not; which proves, That all Parts act their own actions. For, though some Corporeal motions may occasion other Corporeal motions to act after such or such a manner; yet, one Part cannot have another Part's motion, because Matter can neither give nor take motion.
[CHAP. IV. Of STONE.]
All Minerals seem to be some kinds of Dense and Retentive motions: but yet, those kinds of Dense and Retentive motions, seem to be of several sorts; which is the cause of several sorts of Minerals, and of several sorts of Stones and Metals. Also, every several sort, hath several sorts of Properties: but, in my opinion, some sorts are caused by Hot Contractions and Retentions; others, by Cold Contractions and Retentions; as also, by Hot or Cold Densations: and the reason why I believe so, is, That I observe that many Artificial Stones are produced by Heat: but Ice, which is but in the first Degree of a Cold Density, seems somewhat like transparent Stones; so that several sorts of Stones, are produced by several sorts of Cold and Hot Contractions and Densations.