Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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1even, to wit, the ſurfaces of very vaſt Seas, which being alſo far
remote from the continuate ledges of Mountains which environ
it, ſeem to have no faculty of carrying the ſuper-ambient Air
along therewith: and not carrying it about, we may perceive what
will of conſequence enſue in thoſe places.
The revolution of
the Earth
firmed by a new
argument taken
from the Air.
SIMP. I was about to propoſe the very ſame difficulty, which
I think is of great validity.
SALV. You ſay very well Simplicius, for from the not finding
in the Air that which of conſequence would follow, did this our
Globe move round; you argue its immoveableneſſe.
But in caſe
that this which you think ought of neceſſary conſequence to be
found, be indeed by experience proved to be ſo; will you accept
it for a ſufficient teſtimony and an argument for the mobility of
the ſaid Globe?
SIMP. In this caſe it is not requiſite to argue with me alone,
for if it ſhould ſo fall out, and that I could not comprehend the
cauſe thereof, yet haply it might be known by others.
SALV. So that by playing with you, a man ſhall never get, but
be alwayes on the loſing hand; and therefore it would be better
to give over: Nevertheleſs, that we may not cheat our third man
we will play on.
We ſaid even now, and with ſome addition we
reitterate it, that the Ayr as if it were a thin and fluid body, and
not ſolidly conjoyned with the Earth, ſeem'd not to be
tated to obey its motion; unleſſe ſo far as the craggineſs of the
terreſtrial ſuperficies, tranſports and carries with it a part
of contigious thereunto; which doth not by any great ſpace
ceed the greateſt altitude of Mountains: the which portion of Air
ought to be ſo much leſs repugnant to the terreſtrial converſion,

by how much it is repleat with vapours, fumes, and exhalations,
matters all participating of terrene qualities, and conſequently
apt of their own nature to the ſame motions.
But where there are
wanting the cauſes of motion, that is, where the ſurface of the
Globe hath great levels, and where there is leſs mixture of the
terrene vapours, there the cauſe whereby the ambient Air is
ſtrained to give entire obedience to the terreſtrial converſion will
ceaſe in part; ſo that in ſuch places, whilſt the Earth revolveth
wards the Eaſt, there will be continually a wind perceived which
will beat upon us, blowing from the Eaſt towards the Weſt:
and ſuch gales will be the more ſenſible, where the revolution of
the Globe is moſt ſwift; which will be in places more remote from
the Poles, and approaching to the greateſt Circle of the diurnal
converſion.
But now de facto experience much confi meth this
Phyloſophical argumentation; for in the ſpatious Seas, and in their
parts moſt remote from Land, and ſituate under the Torrid Zone,
that is bounded by the Tropicks, where there are none of thoſe

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