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 25
Practical Examples. Ex. 41. The preceding elementary examples afford all theoperations necessary in forming many simple drawings, eitherof geometrical designs for surface ornament^ or of objects. EXERCISES ON RIGHT ANGLES. A specimen or two of each is added in this example. 11 | >ijgfP _4… … The pupil is here again reminded always to make his figuresvery much larger than those of the book, making from two tofour on a plate like those here shown. Ex. 42. Figs. 2, 3, 4, PL I., exhibit other practical examplesof constructions containing only lines at right angles to eachother. Occasions…
Geometrical drawing · Mechanical drawing
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