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 202
manner with each radius in succes-sion, which will determine the points H, K, L, M, IST, 0, P, etc.Draw a fair curve through these points, and we shall obtain alogarithmic spiral. The greater the number of radii used in the construction,the larger will be the angle BAG ; but the angle ABC… … Fig. 317. l82 PRACTICAL PLANE GEOMETRY 10). Bisect the fourth part in the point C (Prob. 1), and fromit draw a line perpendicular to AB (Prob. 5). Make this lineequal in length to four of the divisions of AB, which will givethe eye of the volute D. This is shown to a larger scale at E.With D as…
Geometrical drawing
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