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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 141

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 141
iven by Hay in an appendix, and by the methods of analytical geo-metry, suited therefore only to advanced students, are here given arithmeti-cally in a way suited to pupils acquainted with the elements of geometry. CUKVILINEAE GEOMETKIC BEAUTY. 107 from 10 and 9 in space, to the paper, will be… … ID n Then we evidently have b 10 : 5 10:: c 9 : g 9. That is,see Figs. 15, 16, the ordinate h 10 of an ellipse, is to the cor-responding ordinate, h 10, of the circle described on the longeraxis of the ellipse as a diameter, as the semi-conjugate axis,c9, of the ellipse, is to its semi-transverse…

Geometrical drawing · Mechanical drawing

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