[ 5*4 1 
nor to the Eaft, for the Air over the large Continent 
of 'Tartary is at lead of equal Coldnefs with itfelf. i 
make no doubt but they complain at Archangel , in 
their Turn, of cold North and North-eaft, and even 
Eaft Winds, as much as we do here. The great 
Continent to their South muft be fo cold as to 
make a ftrong Refiftance: To the Weft, the Air 
might find a free Paflfage over the Ocean, were not 
the Colds of North- America too near. The main 
Outlet is between both, towards the Atlantic Ocean : 
The warm Air over which being able, of itfelf, to 
make but a feeble Refiftance, yields to the fuperior 
Force 5 the Conqueror eagerly purfues his Victory, 
and we, happening to lie diredtly in the Way, feel 
then a cold dry North-eaft Wind : This is the Wind 
that brings us Froft in the Winter. When the W inter 
is fevere, it continues to blow all the Spring, and its 
Influence reaches to the End of the Summer.. 
This, I think, fufficiently proves, that Air, flowing 
from a cold to a warmer Quarter, wifi blow dry : 
Bur, like a willing Witnefs, it proves too much ; for, 
if Wind proceeds only from cold Air prefling upon 
hot, and if: Heat makes the Vapour afcend, it follows 
from thence, that Wind can never bring Rair>, 
whereas we find the contrary by fad Experience ; the 
South-weft Wind hath ruled thefe Two Years, and 
ftill doth rule. 
How can this be accounted for, upon the Principles 
commonly received ? That Vapour, wafted from a 
warmer to a colder Region of Air, fhould precipitate, 
is what I have already fhewn. But the Queftion is, 
which 1 have not as yet fecn anfwered, Why does the 
South- weft blow ? What is the Caufe why a Stream 
of 
