£nd them as demonftrative aa can be defired ia Na» 
tural Philofophy. 
In Effed, Experience agrees here with Reafon. If 
a giafs Globe filled with Water be rapidly turned on 
its Axis, one fees little Foulnefies ; the fmall Atoms 
which it never fails to contain, gather together along 
the Axis, and form a little Cylinder round it. 
Which very plainly fhews, that in this fpherical 
Vortex of Water there is but an axifugal Force. 
^E, 2 ). 
Corollary. 
Therefore Gravity is inexplicable in the Vortex^ 
and it has not Strength to defend itfelf towards the 
Poles. 
Theorem II. 
Suppofing there was in the fpherical Vortex a 
central Force according to the Radius O C, it could 
not by Readion be changed into a centripetal Force 
according to the Radius C O. 
This Propofition is well known to all who are 
fomewhat converfant in Mechanics. 
It is therein demonfirated, that if the Radius IC, 
for Example, forms with the Tangent CE an Angle 
of 45 Degrees, the Line of Pveflexion will be parallel 
to the Axis ; and that from the Point C to the Pole 
Z, the Lines of Reflexion will be divergent to the 
Axis; and, in fine, that from the Point C to the 
Equator, thefe fame Lines of Reflexion will be 
indeed convergent to the Axis, but will never ter- 
minate at the Centre O: In a word, that becaufe 
the Angle of Reflexion is always equal to the Angle 
of 
