by Henry Manning
Publisher: Ginn and Company 1901
Number of pages: 93
This book is an attempt to give a simple and direct account of the Non-Euclidean Geometry, and one which presupposes but little knowledge of Mathematics. The first three chapters assume a knowledge of only Plane and Solid Geometry and Trigonometry, and the entire book can be read by one who has taken the mathematical courses commonly given in our colleges.
Download or read it online here: Non-Euclidean Geometry