, MN , &c. that is as 1 ⁄ m f , &c. be fitted Ordinates (at a given Angle) whose Increments are as FL , FM , FN , &c. that is, as 1 ⁄ m g , &c. The Curve answering to the Compound of these Motions, is that wherein the Project is to move.
- This Curve (being hitherto without a Name) may be call'd Linea Projectorum; the Line of Projects, or things projected; which resembles a Parabola deform'd.
- The Celerity and Tendency, as to each Point of this Line, is determined by a Tangent at that Point.
- And that against which it makes the greatest Stroke or Percussion, is that which (at that Point) is at right Angles to that Tangent.
If the Projection (at ¶ 27) be not infinitely continued, but terminate (suppose) at N , so that the last Term in the first Column or Series erect be a ; and consequently in the second, ma ; in the third, mma , &c. (each