The best Maps do not lay down any Mountains of Note between _Tartary_ and the places which have been subject to the Plague: 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 direct contrary Way. And Plants are no less subject to be destroy'd by Insects, than Men and Quadrupedes, is I have explain'd in the Chapter of Blights, in my _New Improvements of Planting and Gardening_.