[ 4>5 ] 
Force to defend itfelf towards the Poles, as towards 
the Equator ; as we fhali fhew hereafter. 
idly^ This Sphere, in ftriking againfl: the ambient 
Matter, would but divide it ad infinitum j becaufe it 
is infinitely foft, and that its Parts have no Adherence 
with each other, ‘ 
^thly. It is not fufficient, that a Sphere turns round 
its Centre, to draw into its Circulation the ambient 
Matter : It is moreover requifite, that to prefs on this 
Matter in a Diredtion from the Centre to the Circum- 
ference, (which a folid Globe either cannot do, or 
can hardly be conceived pollible for it to do) and 
further ftill, it is necelTary there Ihould be Uneven- 
iiefles on this Sphere, and on the concave Surface of 
the ambient Matter; becaufe otherwife, though the 
Sphere fhould prefs this Surface by its centrifugal 
Force, it would only raife it up, or tend to raife it, 
and it would Aide along the Surface without dragging 
it away with it : On which Head there is this Particu- 
larity to be remarked, that, for the uniform Circula- 
tion and Confervation of the Vortex-, and ftill more 
for the preferving of Keplers Laws, the Spheres and 
Surfaces muft be ftridiy Mathematical, as we fhall 
Icon fee ; and for its Formation they muft be rough, 
and full of Unevennefles : But what can be more 
whimfical ? And further, though thefe Surfaces were 
full of Prickles, yet could not the Vortex be formed 
in the Hypothefis of Father Malebranche’s foft Mat- 
ter ; becaufe the Parts which would form thefe Emi- 
nences and Unevennefles on the concave Surface of 
the Matter furrounding the Sphere, not being con- 
nected with the other Parts of the fame Matter, would 
be carried off without Difficulty by the Rotation of 
the 
