Excerpt from Projective Geometry for Use in Colleges and Schools
The present work on Projective Geometry has been written as a companion volume to my former treatise on Homdgeneous Coordinates. It deals, from a geometrical point of view, with those subjects which, in the former volume, were treated analytically. In writing the book I have kept in view the needs of students reading for honours at the Universities and of pupils specialising in Mathematics at the Secondary Schools. I have assumed on the part of the reader a competent knowledge of the Modern Geometry of the Triangle and Circle, and also of Geometrical Conies; but for the sake of clearness and precision I have quoted the main results drawn from these subjects in black type without proof, and have given references, when necessary, where demonstrations may be found. In this way a good deal of ground has been covered, and the book has not been made too long. On the other hand, no attempt has been made to treat of Homography and Involution, as I feel that the student requires a fairly complete account of them before he can make any use of them as instruments of geometrical investigation, and such detailed treatment would have increased the size of the book unduly.
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