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 177
Fig. 29 y--rSi … X Fig. 90. semi-circle A O B should be larger, to give an oval ol thedesired size. S3. Only half ovals are shown, in order to avoid confusing 120 FREE-HAND GEOMETRICAL DRAWING. the figures. They will exhibit themselves better by completingthem ; the two halves on each side of ax hu or a2 b2, being…
Geometrical drawing · Mechanical drawing
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