Spanton, J. Humphrey (John Humphrey) · London, Macmillan and Co., Limited; New York, The Macmillan Company · leaf 236
led a bead or astragal (Fig. 523), which may be Fig. 522. Fig. 523. Fig. 524. incised, so as not to project from the flat surface. Severalparallel beads together are called reeding. The cyma recta (Fig. 524) is formed by combining ovoloand cavetto, the hollow being uppermost, and is suitable fora… … Fig. 526. Fig. 527 The Greek mouldings correspond with these, but theirsection is not circular like the Roman. They^ are for themost part constructed with conic sections, viz. ellipses, orparabolas. But in all probability they were drawn in by hand. Some construction lines for these mouldings are…
Geometrical drawing · Design · Drawing
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