[ 1 
The Snow that falls here is as fine as Dull, but 
never any Hail, except at the Beginning and End of 
W inter. Almoft every Full and Change of the Moon, 
-very hard Gales from the North. 
The conftant Trade Winds in thefe Northern 
Parts I think undoubtedly to proceed from the fame 
Principle, which our learned Dr. Halley conceives to 
be the Caufe of the Trade Winds near the Equator, 
and their Variations. 
“ Wind, fays he, is moll properly defined to be 
<c the Stream or Current of the Air ; and where fuch 
<c Current is perpetual and fixed in its Courfe, it is 
tf necefiary, that it proceed from a permanent and 
<c unintermitting Caufe, capable of producing a like 
“ conftant Effedt, and agreeable to the known Pro- 
“ perties of Air and Water, and the Laws of Motion 
“ of fluid Bodies. Such an one is, I conceive, the 
cl Adlion of the Sun’s Beams upon the Air and W a- 
“ ter, as he pafies every Day over the Oceans, confi- 
“ dered together with the Nature of the Soil and 
“ Situation of the adjoining Continents. I fay, 
“ therefore, firft, That according to the Laws of 
u Statics , the Air which is lefs rarefied or expanded 
“ by Hear, and confequently more ponderous, rnuft 
<c have a Motion towards thofe Parts thereof which 
<£ are more rarefied, and lefs ponderous, to bring it to 
tc an (^^Equilibrium, See. ” 
Now, that the cold denfe Air, by rcafon of its 
great Gravity, continually prefies from the Polar Parts 
towards the Equator, where the Air is more rarefied, 
to preferve an c / Equilibrium or Balance of the At- 
mofphere, I think, is very evident from the Wind 
in thofe frozen Regions blowing from the North and 
Y 2 North- 
