THE THEORY OF PROJECTION, SO FAR AS IT IS

AUXILIARY TO GEOMETRY;

WITH AN ACCOUNT OF THE

PLANE SECTIONS OF THE CONE AND CYLINDER,

WHICH CERTAIN GENERAL PROPERTIES OF THE CONIC SECTIONS ARE

DEMONSTRATED BY HELP OF THE FOREGOING THEORY.

PUBLISHED UNDER THE SUPERINTENDENCE OF THE SOCIETY

FOR THE DIFFUSION OF USEFUL KNOWLEDGE.

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78

84

88

Section 1. First properties of the circle

2. Of angles in a circle

3. Rectangles under the segments of chords

4. Regular polygons, and approximation to the area of the circle

5. The circle a maximum of area, and a minimum of perimeter

6. Simple and plane loci

7. Problems