lague: The _Alps_ run parallel
with the Winds coming from _Tartary_, and therefore does not any Way
hinder their Passage: The Mountains of _Dalmatia_ are not high enough to
prevent the Passage; or if they were, the _Caspian Sea_ is sufficiently
large to let them pass to the South Parts of _Europe_, the _Mediterranean
Sea_, and the North Coasts of _Africa_, even to their most Western Bounds.

Now it may be expected, perhaps, by some, that these Winds should yet
continue their Progress as far as _America_; but as yet, so far as I can
learn, these Land-Winds, when they have blown with the greatest Force, and
have been of the longest Continuance, have not reach'd farther than about
three hundred Leagues beyond the Western Coasts of _Europe_, which is a
Trifle in Comparison of the vast Ocean between us and _America_: Besides,
it is my Opinion, that the Winds which blow over so vast a Tract of Land,
as these _Tartarian_ Winds must do, that I suppose convey and support the
pestiferous Insects, are of so different a Nature from the Winds coming
from the Ocean, that 'tis likely those Creatures which would subsist in
the one, would be destroy'd by the other: So that if I am right in this
Conjecture, _America_ cannot be subject to the Plague.

_Mount-Atlas_, which is a vast Ridge of Mountains, running from the Ocean
almost as far as _Egypt_, and are back'd with the Desarts of _Lybia_, may
very likely obstruct the Passage of these Insects to the South of
_Africa_; and for that Reason, perhaps, secure that part of the World from
Plagues. So likewise _Mount-Caucasus_, or _Ararat_, which is one of the
highest Ridge of Mountains in the World, running from East to West, thro'
_Persia_ and _India_, may secure the South Parts of those Countries from
the Plague, by stopping the Passage of those infectious Creatures, if any
Winds from _Tartary_ should happen to blow them that Way: And as _China_
lies to the East of _Tartary_, so it must be Westerly Winds which must
infect that Country with the Plague, if it proceeds from what I imagine:
But we do not yet find that Westerly Winds are frequent in those Parts; or
if they are, we may be assur'd they cannot blow at the same time when the
Insects are hatch'd and carried the contrary Way by the Wind from
_Tartary_. We are inform'd, that upon the Coast of _China_, the Winds are
so regular, that from _October_ to _March_ they continually blow from the
North-East, and from that Month to _October_, the