Science and art drawing : complete geometrical course ; consisting of plane and solid geometry, orthographic and isometric projection, projection of shadow's the principles of map projection, graphic arithmetic and graphic statics (1895)
Spanton, J. Humphrey (John Humphrey) · London : Macmillan · leaf 535
ETRY lines from c and d perpendicular to the tee-square. Draw linesIroni c and & parallel to ad, and from 5 and d parallel to ac, withthe 30 set-square. Peoblem 242.To draw the isometric projection of a circle. Fig. 294. Let ahdc be a circle drawn geometrically. Inscribe it in asquare efgh.… … Fk. 2C true length. The diameter of the circle, ij, in Fig. 294 alsoremains unchanged, for the same reason. Draw lines from e and g at an angle of 30° till they meet inthe points k and I. This gives the isometric projection of thesquare. Draw lines from i, at an angle of 30°, to determine thepoints…
Geometrical drawing
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