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
Ex. 113. An exercise of peculiar utility, is found in sketchingeasy curves through several given scattered points. This opera-tion frequently occurs in geometrical drawing, when other than
Geometrical drawing · Mechanical drawing
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