4 & The Doctrine

It will be— 2 As/x fE y because the Ab-scissa? Ve> is, in that Cafe, lels than Vfthe Distance from the Focus to theVer-tex, as is easily observ’d by the Figure.

COR. I.

Hence, if FAT be the Sublimity os anyParabola, and is ATA be parallel to theOrdinate E G, and G R parallel to theAxis VCi GRyGfy and E K will still beequal.

COR. II.

Hence, if a Circle is defcrib’d on anyPoint G of the Curve with the RadiusKE y or G Ry equal to the Height andSublimity, the Circumference of thatCircle will still pals through the FocusPoint of the Parabola.

COR. III.

Hence, if one End of the ThreadgEf [Fig. i y.) equal in Length to the

Side