(470 
for in the clear Sky the Dew would fall fo faft as to cover, 
each half quarter of an hour,my GlafTes with little drops, fo 
that I was necefiitated to wipe them fo often, and my Pa- 
per on which I wrote my Obfervations would immediate- 
ly be fo wet w 7 ith the Dew, that it would not bear Ink: 
by which it may be fuppofed how faft the Water gathers 
in thofe mighty high Ridges I but now named. 
Thus is one part of the Vapours blown upon the Land 
returned by the Rivers into the Sea, from whence they 
came ; another part by the cool of the Night falls in Dews, 
or elfe in Rains, again into the Sea before it reaches the 
Land, which i9 by much the greateft part of the whole Va- 
pour, becaufe of the great extent of the Ocean, which the 
motion of the Winds does not traverfe in a very long fpace 
of time. And this is the reafon why the Rivers do not 
return fo much into the Mediterranean as is extratted 
in Vapour. A third part falls on the lower Lands, and 
Is the Pabulum of Plants, where yet it does not reft, but 
is again exhaled in Vapour by the A&ion of the Sun, and 
is either carried by the Winds to the Sea to fall in Rain 
or Dew there, or elle to the Mountains to be there turn- 
ed into Springs; and though this does not immediately 
come to pafs, yet after feveral viciflitudes of rifing in Va- 
pour and falling in Rain or Dews, each particle of the 
Water is ar length returned to the Sea from whence it 
came. Add to this that the Rain-waters, after the Earth 
is fully fated with moifture, does by the Valleys or 
lower parts of the Earth find its way into the Rivers, 
and fo is compendioufly fent back to the Sea. After 
this manner is the Circulation performed, and I doubt 
not bat this Hypothefis is more reafonable than that of 
thofe who derive all Springs from the Rain waters, which 
yet are perpetual and without diminution, even wherr 
no Pvain falls for a long fpace of time : Or than that that 
derives them from a Filtration or Percolation of the Sea- 
waters through certain imaginary Tubes or paffages with- 
