r 142 ] 
Having fhewn how I think vapour may coalefce 
into rain, I fliall now endeavour to explain the phse- 
nomena of the weather, 
Firfl, Why our fouth, fouth-weft, and weflerly 
winds are wet in winter. I have before fhew^n that 
the wind, and the vapour with it, mud; tend from the 
tropic toward the pole, and how it may be varied to 
the north-eaft and to the eaft. In the cold winter 
leafon the vapour, in this courfe, mud: coa’efce more 
and more, as it comes into the colder regions, and at 
laft come down in mills and rain j and the more the 
column of air is decreafed by the fall of fuch mills 
and rain, the more room is there for fucceeding va- 
pours to be prelfed into the fame courfe, and to fall 
in like manner j and fo on ^ which may occadon the 
continued courfe of thefe winds, and wet, which o-ene- 
rally attends our winters. But fometimes, a^ the 
fall of thefe rains, the wind comes in from the 
north- well, to rellore the balance of the atmofphere, 
and roll the vapours (Hill doating in the air), by' 
altering their motion, into heavy denfe clouds, which, 
upon their fudden coalition, let fall heavy Ihowers, 
But by that means the remaining particles of vapour 
in the cloud have a greater quantity of eledlric duid 
diHributed among them which enables them to 
afcend, and form what the failors call a hard dry 
Ikyj and as they approach farther into a warmer 
climate, which increafes the power of the eledlrical 
duid, they rife, didipate, and vanilh out of fight ; 
and this is the general confequence of north-well 
winds. As to the north and north-eall winds, what- 
ever vapour they bring with them, has its repulfive 
and afcending power (that is the eledric duid) fo in- 
creafed 
