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Elements of plane and solid free-hand geometrical drawing, with lettering; and some elements of geometrical ornamental design, including the principals of harmonic angular ratios, etc. In three parts ... for draughtsmen and artisans; and teachers and students of industrial and mechanical drawing (1878)

Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 157

An illustration from Elements of plane and solid free-hand geometrical drawing, with lettering; and some elements of geometrical ornamental design, including the principals of harmonic angular ratios, etc. In three parts ... for draughtsmen and artisans; and teachers and students of industrial and mechanical drawing, 1878, leaf 157
e the eye is the best instrument for testing the beauty * The advanced student, if acquainted with Descriptive Geometry, willrecognize the surface from which these ovals are cut as a right conoid, whosedirectrices are the semi-circle ACB, and a vertical at O, equal to AC, andwhose elements are all… … t

Geometrical drawing · Mechanical drawing

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

More pictures from Elements of plane and solid free-hand geometrical drawing, with lettering; and some elements of geometrical ornamental design, including the principals of harmonic angular ratios, etc. In three parts ... for draughtsmen and artisans; and teachers and students of industrial and mechanical drawing

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