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 453
nd w (20 — 177 = 2-3). Join Qio, which is the radius required.With c as centre, set off on the line through cQ the points s and geach equal to QiW. This is the major axis of the ellipse formingthe projection of the base of the cone. From Q! set off C% equalto c%o. Draw ihi perpendicular to cd. From… … ■Zo id 40 SO 60 ft^t Fiff. 230. The application of horizontal projection to the plan of apiece of land is shown in Fig. 230. HORIZONTAL PROJECTION 433 The indices show the levels of the different points above orbelow the zero level, and are taken 10 feet apart. Each curvedline, called a contour^ is…
Geometrical drawing
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
