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 134
e known to be equal,by measurement and computation of their areas. Also, if one were trying to sketch a symmetrical, that is an 80 FREE-PIAND GEOMETRICAL DRAWING. isosceles triangle of pleasing form, he would do it by tryingvarious angles between the base and the adjacent sides, as in-dicated at A,… … A B 16. Summary.—Distance and Direction, are two radicalgeometrical ideas. Distance lies at the foundation of size, aslarge or small. Direction lies at the foundation of form, orthe shape of things ; and it is the form of objects rather thantheir size, which determines their beauty. Hence…
Geometrical drawing · Mechanical drawing
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