_Fossils_, he _first_ takes notice of the _Metals_ found in
_English_ Mines; as _Silver, Tin, Copper, Iron, Lead, Antimony_, and some
_Gold_ extracted out of _Tin_. Next of the _Stones_, of which he finds
about 70 sorts; & amongst them, _Bristol Diamonds, Agates, Hyacinths,
Emerods, Loadstones, Toad-stones_, (which last yet he affirms to be nothing
but the grinding-teeth of the {365} Fish _Lupus_) _Pearls, Corals, Marble,
Alablaster, Emery:_ To which he adds the various kinds of _Coals_; as also
_Bitumens, Turfs_ and _Jets_. And _thirdly_ of the various kinds of _Allam,
Vitriol, Niter, Sea-salt, Pit-salt_. But _fourthly_ of the various
_Earths_, of which he reckons up 15. peculiar sorts (besides those that
serve for _Husbandry_, which are not easily numbred;) and amongst them,
_Read-lead, Black-lead_ and _Fullers-earth_.

He concludes all with mentioning the several _Meteors_ appearing in
_England_; and the _Hot springs_; and _Medical Waters_; as also, the
_Salin, Petrifying_, and some more unusual Springs: _Item, Subterraneous
Trees, Subterraneous Rivers, Ebbings and Flowings of Wells_, &c.

II. _PLACITA PHILOSOPHICA Guarini._ The chief subject of this Treatise is
Natural _Philosophy_; upon many important questions whereof it enlargeth,
as those of the Motion of the Coelestial Bodies, of Light, of Meteors, and
of the vital and animal functions; leaving sometimes the common opinions,
and delighting in the defence of _Paradoxes_.

_E. G._ That the material substantial Form, is nothing but _mera potentia_,
and subsists not by it self: by which means the Author judges, he can free
himself from many great difficulties touching _Generation_ and
_Corruption_, which do perplex the other Philosophers.

He holds _Epicycles_ to be impossible, and _Excentricks_, not sufficient to
explicate the motion of the Stars; but that all the irregularities of this
motion may be salved by the means of certain _Spiral_ Lines; largely
proving this _Hypothesis_, and particularly explicating the motion of each
Planet.

He denies the middle Region of the Air to be cold; and believes that cold
is not necessary to condense the vapours into Water.

He admits not that received Axiome, _That the generation of one Body is the
corruption of another_; maintaining that there are _Generations_, to which
no corruption ever preceded; and that it may happen, that one Animal
without dying may be changed into another Animal.

He alledges several reaso