( 574 ) 
Paradox^ will hold good. This is demonftrated by aU: 
Bydroftaticai Writers. 
s 
Figure 5 “. 
Let EF reprefent part of the Surface of the Earth; 
and GEFH a Pillar of the At:7iofphere, whole 
Height is GE the whole Height of the Air. Let us 
imagine the Vapours rifing out of the Earth to form 
themfelves into two Clouds A and B, and to fettle in 
that Place where the Air is of the fame fpecifick Gravity 
with themfelves. It is evident that they will caufe the 
Air to rife fo much higher as their Bulk amounts to, 
and will therefore make the Surface which was at GHto 
rife up to IK, fo that the bottom EF which was 
pfefs’d by a Pillar of Air as GEFH, is now prefs’d 
by an higher Pillar as lEFK. Now if the Clouds 
A, By by any Caufe Ibever, change their Place, fo as to 
come downwards, ffor Exemple to E, D) the Height of 
the Pillar I EF K will remain the fame as it was, and 
therefore the Bottom E P will be prefs’d as before .- by th& 
foregoing Propofition, 
Corollary L 
If the Clouds A, B defeend, and in their Delcent 
keep the fame Bulk as they had before, the Surface IK 
will remain the fame, and therefore EF will be prefs’d. 
as before. 
CoroUar'j II. 
Whether a Body be fpecifically lighter or fpecifically 
heavier than a Fluid ; fo long as it is detain’d in it, it 
will add to the Fluid as much Weight as the Weight 
of an equal Bulk of that Fluid: wherefore a Body does 
not. iofe all that Weight which it added to the whole 
Weiglit 
