ling with
the _Cardinal_ of _Hassia_ into _Sicily_ (in which Voyage, he saith, He met
with, as it were, an _Epitome_ of what may be observable in the
Subterraneous parts of the Earth; and in particular, with an Earth-quake of
14 daies duration, very instructive to him concerning several great Secrets
of Nature:) having I say, thus Prefaced, he divided his Work into 12
_Books_, wherein he affirms not only to have explicated the Divine
Structure of the under-ground World, and the wondrous distribution of the
Work-houses of Nature, and her Majesty and Riches therein; but also to have
opened the Causes of her Effects and Productions; whence, by the Marriage
of Nature and Art, a happy Issue may follow for the use and benefit of
Humane Life.

In the _First_ Book, he considers the nature of the Centre of the Earth,
where he delivers several _Paradoxes_ touching the same, and Discourses of
the Motion of heavy Bodies, of Pendulems, of Projectils. {110}

In the _second_ he treats of the Fabrick of the _Terrestrial Globe_, of the
Influences it receives from the Coelestial Bodies, especially the _Sun_ and
_Moon_, of both which _Luminaries_ he gives a _Scheme_; of the proportion
of the Earth to the Sun and Moon; of the external conformation of the
Earth, its Mountains, and their concatenations, decrease and increase,
together with the strange transformation thereof. Further, of the Waters
encompassing the Earth, and their various Communications by hidden
Passages; as also the heighth of Mountains, and of the depth of Seas; the
dimension of the _Sicilian Straights_; the Magnetical Constitution of the
Earth, its Heterogeneous Nature, Interior Frame, Laboratories, Caves,
Channels, &c.

In the _third_: Of the Nature of the Ocean, and the diversity of its
Motions; of its general Motion from the _East_ to _West_, Currents;
Reciprocations, Gulfs, Whirle-pools, Saltness, &c.

In the _fourth_: Of the Nature of the Subterraneous _Fire_, its necessity,
diffusiveness, food, prodigious Effects through ignivomous Mountains; as
also of the Nature of _Air_, and _Winds_, their power and variety; of the
general Wind, how and whence generated; of Periodical and Anniversary
Winds, and their Causes; as also of the production of Artificial Winds, for
refreshment and other advantages. To which he subjoyns a Discourse, tending
to prove, That all Meteors owe their Nativity to the Fiers of the
Subterraneous World.

In the _fifth_: Of the Original of Spr