r 
. f ^^9 ] 
electrical fire, and the contraction at night, and the 
coalition of the vapours, to occafion their total de- 
fcent, will be fufficient to produce a very great va- 
riety of winds on this fide the tropic. But if I were 
to fet down all that has occurred upon this fubjeCt, 
about upper currents, under currents, and interme- 
diate tranfverfe currents, occafioned by the va- 
rious motions of the atmofphere, to reftore an equi- 
librium, and to produce my proofs, I mufi: fend you 
a book, inflead of a letter. But I'write not to com- 
mon minds. 
It now remains to fhew, how the general ph^eno- 
mena of the weather and barometer arife from this 
fyftem. Firfi:, Why it generally rains in winter, 
while the wind is fouth, fouth-weft, and wefterly. 
Secondly, Why north-weft winds are generally at- 
tended by fhowers in the beginning, and become 
more dry, as they are of longer continuance. Thirdly, 
Why north and north-eaft winds are generally dry. 
Fourthly, Why the eaft wind continues dry and 
dark for a confiderable time together. Fifthly, Why 
fqualls precede heavy and diftinCl fliowers ; and why 
a calm enfues for fome little time after they are 
pafs’d. Sixthly, Why ftorms and high winds feldom 
happen in a ferene ftcy without clouds. Seventhly, 
Why the vapours, in warm feafons, coalefce to form 
thofe diftind denfe clouds, which produce thunder 
and heavy fhowers. Eighthly, Why the barometer 
falls loweft in long continued rains, attended by 
winds j and why it rifes higheft in long continued fair 
weather ; and why the intermediate changes happen. 
Ninthly, Of land-breezes and fea- breezes, and wa- 
ter-fpouts. 
T 2 Firft, 
