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the same Proportion, a greater or smaller Density.

     16.  In the same manner, 1/ST² ; Is to 1/SC² : As TY or Ty made Exponent of the Gravitation in the Region of the Earth and of the Moon towards the Sun, To 

TY x ST²
________
 SC²     

, or To 

Ty x ST²
________
  SC²

; that is, To the Correspondent Exponent of the Gravitation in C towards the Sun.  Which Gravitation being also as 1/SC² ;  It follows that TY x ST² or Ty x ST² is also a determined Quantity; And that by consequence TY or Ty is reciprocally as ST². 
And so TY or Ty, as well as HI or HK, or else as hi or hk, may safely be made the Measure or Exponent of the Gravitation of the Earth or of the Moon towards the Sun, in whatsoever Point the Focus F or f may be placed upon the Line PT:  And all this, as I have said already, depends upon the greater Density or Rarity which we shall find to belong to the Solar Matter, supposing the Sun to remain at the same Distance from the Earth.

     17.  But supposing that the Distance of the Sun does alter, as it does [[strikethrough]] alter [[/strikethrough]] throughout the year; Then the Sine of the Parallax of the Sun placed in ∫, in reference to the Orbit of the Moon, would be reciprocally as the Distance c∫ betwixt the Centers of the Sun and of the Orbit of the Moon.  And likewise cT would be reciprocally as the Distance c∫; since cT is to CP as CP to c∫.  Therefore cT, which is always a Natural Sine in the Sphere olp, having now its variable Center in c, would always be the Sine of that Parallax of the Sun; taking for Radius CP or cp, or the Radius of the Orbit of