Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 173
le enclosing the given figure, and divide it in a similarmanner. XIV PRINCIPLES OF SIMILITUDE 151 Draw the curves to intersect these smaller divisions in thesame places as the larger divisions are intersected by the givenfigure. Q r > ti \ / ^ \ / 1 \ A / -0 \ ^ ■<N^ f) L^ E r > ^ 1 / / ■^… … A conic section is obtained by intersecting a cone by a plane.There are five different sections to a cone, viz.— 1. A triangle, when the planecuts the cone through its axis, 2. A circle, when the plane cutsthe cone parallel to its base, as at A,rig. 281. 3. An ellipse, when the plane cutsthe cone…
Geometrical drawing
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