The laft thing I {hall offer to your confideration isa- 
nent thole ftrong and lafting winds which ufually fall 
out zhont the .Squinai^izals^ and thatfor any thing I can 
learn thro' all parts of the known earth. The caufes 
of thofe particular, various, uncertain and unconftant 
winds which do blow in the Countries without the Tr(?- 
picks^ and that moft frequently in IMountainous places and 
more feldom in great Plains inch as Poland, I cannot fo 
eafily conjecture : but thofe general winds which ufually 
fall out everie where about both jEquinoUials , feem to 
proceed from fome gen^eral caiife, and this 1 take to be 
the change of the M<?;^/9;2j" and trade winds about thefe 
times between the Tropicks. For there muft needs be 
about thefe feafons a change of the Bcillance of the At- 
mojphere according to what I have difcourfed on the 
third head, and this I think cannot but occalion ftrong 
V/inds over all the Earth. 
Thus, Sir, at the defire of the Philofophical Society, I 
have prefum'd to trouble both them and you with thefe 
farther Notes I had by me concerning Weather. The 
undoubted truth and certainty of all thefe Phenomena 
I cannot warrandj (moft of them I had from Purchas 
his Pi/^rmj", whole Relations donotnow pafs for fabu- 
\om>) far le^s can I alTert my conjedlures to be their 
true caufes. I have propoled both only that I may 
give you occafion to employ your Philofophical Cor- 
refpondence on this fubjed: alfo , and particularly 
to engage your acquaintances who go to the Eaft or 
Weft Indies^ to get particular and certain informa- 
tions of the ftated Seafons between the Tropicks both 
as to winds and rains, &c, in the open Seas, the 
Bayes , Continents , &c ; and the particular fituations 
of the Mountains as to the Quarters of the Heavens 
where thofe different Seafons are on their oppolite 
fides^ and that your Learned Society may continue to 
C c c 3 
take 
