[ ] 
for all the irregular winds within the tropics, I 
^all only venture to fay, that, where fuch happen,, 
it muft be by means of fome tracts of land, which rife 
to a greater height above the horizontal- level, than 
vapours generally do j by which the motion of the 
vapours is flopped, and the vapour accumulated by 
fucceeding vapour, and the air, upon which they 
float, is of confequence preffed into a new diredlion. 
And from hence may alfo be explained the caufe of 
the rains, particularly fo called in the fea language. 
I mufl now confider what becomes of the vapour, 
^c. floating from over the tropics toward the poles ; 
which being lefs affeded by the heat of the fun, re- 
flected from the furface of the globe, the furround- 
ing eledlrical fire begins to condenfe more and more 
as it moves toward the poles, and the vapours of 
courfe to defcend; and that part mofl, which is mofl 
remote from, or is farthefl left behind by the fun ; 
and of confequence the higher column of air mufl 
tend that v^'ay to reftore the equilibrium; which mo- 
tion, at this fide the equator, mufl be to the north- 
eafl ; and as the vapour, fall again to the earth, 
the motion mufl be more to the eafl. From whence 
our fouth-wefl and weflerly winds, which blow a 
confiderable part of the year. 
But as this fyflem is too regular to account for 
the phaenomena of the erratic winds, we mufl con- 
fider whence they arife. I have before obferved, that 
tradls of land riling into the atmofphere will flop the 
regular motion of the vapour, ^c. and that the va- 
pour being accumulated by fucceeding vapour, the 
fubjacent air mufl be preffed into new diredlions. 
Now this caufe added to the daily dilatation of the 
eledlrical 
