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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 44

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 44
The external angles of a pentagon formed by producing orextending its sides, are each equal to 72°, or four-fifths of a rightangle, and are constructed accordingly. The five pointed staris most agreeably proportioned, by joining the alternate pointsin order to obtain the direction of the sides of…

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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