Chapter XI: Part I: Orthographic Projections. $1.75

This is a modern treatment of descriptive geometry with applications to spherical projections, shades and shadows, perspective, and isometric projections, for the use of technical schools and colleges. Though based upon Professor Church’s Descriptive Geometry, and retaining as much as possible the original lucidity and conciseness, this work differs from it quite widely.

Among the salient features of the book are the following: The figures and text are included in the same volume, each figure being placed beside the corresponding text; General cases are preferred to special ones; A sufficient number of problems are solved in the third angle to familiarize the student with its use; A treatment of the profile plane of projection is introduced; Many exercises for practice have been introduced; Several new problems have been added; The old figures have been redrawn, and many of them have been improved; Several of the more difficult elementary problems have been illustrated by pictorial views; In the treatment of curved surfaces, all problems relating to single-curved surfaces are taken up first, then those relating to warped surfaces, and finally those relating to surfaces of revolution. Experience proves this order to be a logical one, as the procedure is from the simple to the more complex. Also the student is more quickly prepared for work on intersections and developments.

AMERICAN BOOK COMPANY

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Transcriber’s Notes:

Italics are shown thus: _sloping_.

Small capitals have been capitalised.

Variations in spelling and hyphenation are retained.

Perceived typographical errors have been changed.