( 8i )

CHAP, I.

O/Projections madeonthe Plane of the Hori-zon.

CASE I.

A Piece whose greatest Randon isA M (Fig, 13.]= 8ooo, Querqher Elevation to strike an Ob-ject at », whose Distance from theEiece is Am = 5 % 8 o,* as also the HeightCV y and Sublimity V K, of the Pro-jection.

I AM=^A{~ 400 Oyh AC—

2-640, then, As: AC:: R: S, As C =»4*°. 18', and po°— iAfC— 69°. 21',the higher Elevation, also \AfC^ 2 o°.

M }9