Excerpt from The Descriptive Geometry and the Perspective of the Straight Line: With a Brief Introduction to That of Curves Accompanied by Many Exercises
The idea which has governed the outlining of the work indicated in the following pages has been that the value of the study of Descriptive Geometry lies, for the ordinary student, chiefly in the discipline which his imagination receives through his familiarizing himself with the fundamental operations of that portion of applied Geometry. My aim has therefore been to strike the happy mean between a treatment of the subject so abstract and difficult as to call forth no clear ideas in the mind of the student, and one so diffuse and easy as to call forth no real mental exertion on his part.
The method herein adopted is one which has been hammered out in the actual work of the class-room. Attention is particularly called to the use made of perspectives of figures embodying the fundamental relations as shown in Plate I. In some respects, the use of perspective representations will be found to be equally efficient with that of models; in others the superiority of models is, of course, undeniable.
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