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 167
or all-engaging pursuit, give more of lifeto it as a symbol. As contrasted with a circle, for a window, its compression inone direction may make it expressive of partly constrained orcontracted, rather than of full-orbed and equally all-embracinglife and character. Hence elliptical topped windows,… … ing that it consists of two equal, opp)osite, and infinite branches,ADF and GEB, Fig. 36, to which a pair of straight lines, Mand N, crossing at the centre C, are tangent only at an infinitedistance from C. Such lines are called asymptotes. The fixedpoints R and K are called its/be^, each one, 2i…
Geometrical drawing · Mechanical drawing
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