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, etcIn three parts ..for draughtsmen and artisans; and teachers and students of industrial and mechanical drawing . \ I \ \3/ V ^7. - X y /jt—^v—Y^. Flo-.^aVl CUEYILmEAE GEOMETRIC BEATJTT. OVALS. 119 base db^ Figs. 29, 30, of the transformed triangle, must beshorter than the greatest width, 2 O C, or 2 S (g, of the axis, Ox Ji, of the oval, being thns brought nearer to O, the

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmechanicaldrawing