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 . 32 FREE-HAND GEOMETKICAL DEAWING. Ex. 86. Embraces circular lines.

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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmechanicaldrawing