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 65
circular curves are to be described. The essential things to beobserved in these cases, are, first, to avoid all sudden, irregular,and unnecessary variations in the rate or degree of curvature, 44 FREE-HAND GEOMETRICAL DRAWING. and, second, especially to avoid making an angle at any pointin the…
Geometrical drawing · Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
