It is not often that the writer of a mathematical book is privileged to have such a varied experience as the author of this volume. Mr. Craig declares in the preface that he has been called upon to ...

Horizontal lines run left to right, parallel to the horizon, with slope 0 and equation y = k. Vertical lines run top to bottom, perpendicular to the horizon, with undefined slope and equation x = k.

IT is too often the custom to regard analytical geometry and analytical conies as synonymous terms. Most introductory treatises on Cartesian methods limit their scope to the investigation of ...