nuated when & where the laid Winds continue to bIow,and 
that more or lefi according to their Violence ; Add to whici^l 
that the Horizontal motion of the Air being fo quick as it iS;,) 
may in all probability take off fbme part of the perpendicu- 
lar preffure thereof : and the great agitation of its particieS;,is 
the realbn why the Vapours are diffipated and do not con- 
denfe into drops^ fo as to form Rain, otherwife the natural 
confequence of the Airs rarefadion. 
4. Why caeteris paribus the Mercury fiands highefi ufm 
an Eafierly cr North-eafterly Wind. This happens becaufe 
that in the gr^^t Atlantick Ocean on this fide the 3 5/^^ de- 
gree of North Latitude, the Wefterly and South- Wefter- 
ly Winds, blow almoft always Trade^ ibthat whenever 
here the Wind comes up at Eaft and North-Eaft, "'tis fure 
to be checked by a contrary Gale, as fbon as it reaches the 
Ocean ; wherefore according to what is made out in our 
lecond Remark, the Air muft needs be heaped over this 
IJland', and confequently the Mermry muQ[ &md high, as 
often as thefe Winds blow. This holds true in this 
Country, but is not a general rule for others, where the 
Winds are under different Circumftances ; and I have 
fbmetimes leen the Mercury here as low as 29 Inches, upon 
an Eafterly Wind, but then it blew exceeding hard, and fb 
comes to be accounted for by what was obferved upon the 
jd. Remark. 
5. Why in calm frojly weather the yV^xcmy generally fiands 
high. The caule hereof is, as I conceive that it feldom freefes 
but when the Winds came out of the Northern and North- 
Eaftern Quarters, or atleaft, unlefs thofe Winds blow at 
no great diftance of, for the Northern parts of Germany ^ 
Denmark^ Sweden^ Norway^ and all that tra£t from whence 
Nofth-Eallern Winds come, are fubjed to almoft continual 
Froft all the Winter ; & thereby the lower Air is very much 
condenfed, and in that State is brought hitherwards by thoft 
Winds, and being accumulated by the Oppofition of the 
Wefterly Wind blowing in the Ocean^ the M^Ycury muft 
needs 
