The DoBrine :

terSj that is, in the Right-Line AXthat joins the ObjcctA', and Engine A.

E- L D.

C 0 R. I. ;

After the fame Manner it is demon-strated that the greatest Randon A X .•(Fig. i i.)on any descending Plane, hasthe Focus Point f of the Parabolaitl the Line that joins'the Object X$and Engine; A , which is dbviousbyt’heFigure and what-was/aid in the last*

- / C Q R>,'MT. —

-■Jii

Hence, (and from Tfceo:$:)tbe great-est Randon on any Plane, arid conse-quently the least Force that can reachany Object:, is. with a Direction thatbisects the Angle between the Objectand Zenith."

C 0 R. III.

The greatest Randon that can bemade by any Impetus on any ascending

Plane,