[1149] 
and fo they fail on Weftwards with ftill winds, fo as 
they have toarce any need to touch their fails in the 
whole Voyage : and this they give as the reafon why the 
Voyage from Spam to the Weii-Indies is Ihorter, more 
eafie and more affured than the return to Spain, In ths 
South Sea alfo going from new Spain or Peru to the Fhi-- 
lippines or China ^ their Voyage is eafie failing always ' 
from Eaft to Weft neer the line, where the Eafterly 
winds- blow in their Poop. Jcojia reports that in the 
year 1584 there went a Ship from Calloam Lima 10 th^ 
Philippines^ which failed 2700 Leagues without fight of 
Land and this in two months, without want of wind ar 
any torment, and their courfe was almoft ftill under the 
Line. For from Lm^ which is 12 degrees to the South 
he came to Manilla which is as much to the North. 
Now thefe continual Eafterly winds between the Tro* 
picks I luppofe to proceed both from the motion of the 
Earth and the Vertical influences of the after this 
manner. As you know the vaft fluid and jEther in which 
the Earth floats in its annual motion, moves forward with 
the Earth in that motion, or rather carries the Globe of 
the Earth along with it ,* even fo the Atmof^here and a 
large Vortex oi jEtber beyond the Moon goes round with : 
the Ea^rth in its diurnal motion, which tho' according 
as it is removed from the Earth it may be proportionably 
flower in its motion, yet that portion of the Jtmofphere 
which is neareft the Earth and lurrounds it, maybe fup? 
pofed to keep equall pace with the Earth in its motion, 
and if there were no changes in the Atmofphers Gravity^ 
I fuppofe it would always go along v/ith the Giobe of the 
Earth from Welt to Eaft in an uniform motion^ which 
would be wholly infenfible to us. But that portion of 
the Atmofphere under the Line being extreamly rariiied., 
its fpring expanded, and foits gravity and preffure much \ 
lefs than the neighbouriHg parxs o£the At^mo/p here, and 
Gonlequently uncapable of the uniform motion to the 
