ir Poyson, as that it exserts not its
noxiousness, till after some {112} time: Where also occasion is taken to
discourse on the Original of Diseases, and cure of Poysonous ones.
Secondly, of the wonderful Nature of _Sulphur, Antimony, Quick-silver_,
their origine and qualities; together with the productions of _Corals_ and
_Pearls_.

In the _tenth_: First of _Metallurgy_, and the way how that unctuous Body,
out of which mettals are produced, is elaborated by Nature, and what
therein are _Sulphur, Salt_, and _Mercury_; besides, what it is that
renders Mettals fluid in the Fire, but not Stones and Vegetables, &c.
Secondly, of the Requisits to a perfect knowledge of the _Metallick Art_,
and of the Qualities of the _Mine-master_; then of the Diseases of
Mine-men, and their Cure, and the waies of purging the Mines of the Airs
malignity; as also of _Metallognomy_, or the signs of latent Mettals, and
by what Art they may be discovered. Thirdly, several Accounts sent to the
Author, upon his Inquiries by the Mine-masters themselves, or other cheif
Over-seers of the Mine-works, touching the variety, nature and properties
of Minerals, and the many Accidents happening in Mines, particularly the
_Hungarian_ ones at _Schemnitz_, and those of _Tyrol_. Fourthly, of several
both _Hydraulick_ and _Wind-Engines_, to free the Mines from Water and
noxious damps. Fiftly, Of the way of working Mettals, Gold, Silver, Copper,
Iron, and particularly of the method used at _Potosi_ in _Peru_, of
extracting the Silver out of the Mineral: to which is added, a Discourse of
_Salt-pits_, and the way of making Salt.

In the _eleventh_, First, of _Alchimy_, its Original and Antiquity, the
Vessels and Instruments belonging thereunto. Secondly, of the _Philosophers
Stone_, what is meant by it, and whether by means thereof true Gold can be
produced? And in general, whether there be any such thing, as a true and
real Transmutation of one Mettal into another? Where are delivered the
several Processes of the reputed _Adepti, Raymund Lulle, Azoth, Arnold de
Villanova, Paracelsus, Sendivogius, &c._ but all exploded as fals and
deceitful. Thirdly, {113} of the decisions in Law concerning Chimical Gold,
true or fals. Fourthly, what the celebrated _Philosophers Stone_ was among
the Ancients, and what they understood by the same?

In the _twelfth_: First, Of the _Seminal Principle_ of all things, its
origine, nature and property; of the way how Nature proceeds in t