There are three ſeveral ways moſt fre-
quently uſed for the reſolving of theſe kind
of Doubts.
1. From thoſe Magnetical Qualities,
which all Elementary Bodies do par-
take of.
2. From the like motions of other things
within the room of a ſailing Ship.
3. From the like participation of motion
in the open parts of a Ship.
1. For thoſe Magnetical Properties, with
which all theſe Bodies are endowed. For
the better underſtanding of this, you muſt
know, That beſides thoſe common Elemen-
tary Qualities of Heat, Coldneſs, Drineſs,
Moiſture, & c. which ariſe from the pre-
dominancy of ſeveral Elements; there are
likewiſe other Qualities (not ſo well known
to the Ancients) which we call Magnetical,
of which every Particle in the Terreſtrial
Globe does neceſſarily participate: and
whether it be joined to this Globe by conti-
nuity or contiguity; or whether it be ſe-
vered from it, as the Clouds in the ſecond
Region, a Bird or Bullet in the Air; yet
does it ſtill retain its Magnetical Qualities,
together with all thoſe Operations that pro-
ceed from them.
Now from theſe Properties do we ſup-
poſe the Circular Motion of the Earth to
ariſe.
If you ask, What Probabilities there are,
to prove that the Earth is endowed with any
ſuch affections? I anſwer: ’Tis likely, that
