C 4*8 3 
Corollary I. 
Therefore if a Vortex be in <iyEquilibrmm with 
another Vortex^ and that the Equator of one happens 
toanfwcr to theToles or Tropics of the other j the 
latter will be burft and penetrated to the Centre : 
And I do not think, that the Cartejtans can find their 
Account in this Confequence. 
Corollary II. 
Therefore if the Vortex was the mechanical Caufe 
of Gravity, Gravity ought to be greater at the Equator 
than at the Poles j and the Earth would be an oblong 
Spheroid j which is contrary to Obfervations. 
Remark. 
I have faid, that it was making a large Concelfion 
to the Cartejtans, to fuppofe that the Globules of 
both the Circumferences have an equal Velocity. 
For if a Sphere full of Water be made to turn on its 
Centre, Experience teaches, that the Velocity is 
greater at the Equator than in the parallel Circles; 
Since it is obferved, that the Times of their periodical 
Revolutions are equal. Whence it follows, that I 
have, in my Demonftration, made the moft favour- 
able Suppofition for the Cartejtans that was poffible. 
Theorem IV. 
In order to determine the Tendency of a Layer 
towards the Upper Part of the Vortex, regard muft 
be had not only to that which refults from its own 
Circulation, but alfo to that which it receives from 
the 
5 
