Excerpt from Descriptive Geometry
In adding to the already long and excellent list of texts on Descriptive Geometry, the writers have not attempted to present any new abstract material nor even to include all of the standard problems. On the other hand, they have sought to avoid a presentation which dwells solely on the practical side of the subject.
The value of Descriptive Geometry in developing the imagination, through the ability to visualize, has, for a long time, been fully recognized, not only in the schools, but also by men who have won recognition and maturity in the practice of their professions. The average technical student, however, while eager in the pursuit of any subject which seems to offer an immediate and definite return, is reluctant to apply himself to a subject whose value is not at once apparent.
In preparing this text, the attempt has been made to hold the student's attention by means of introductory paragraphs and other explanatory matter intended to show the relation of the principles under discussion to structural work. At the same time the treatment of the various subjects is kept purely abstract in order to avoid, in so far as is possible, the tendency of the whole subject to degenerate into practical rules and formulas. Finally, there has been added a set of exercises designed to show the application of the abstract ideas to concrete, work-a-day problems. These applications have been grouped apart from the abstract problems in order to make it possible to use them with more or less freedom as the case may require, and also to emphasize the secondary and dependent character of such problems.
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