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 562
O F H Fig. 322. AB produced in D. Draw DE, one unit in length, perpendicularto AD. Join AE. Then AE = ^3- Proceed in the same manner to find the square roots of4, 5, etc. Problem 270. To determine — by constntction. Fig. 323.Let vi — 7 and 71 = 9. … Fig. 323. Draw AB and BC perpendicular to each other. Set off BD on BA = 9, and BE on BC = 7. Join DE. 542 SOLID GEOMETRY Set off BA = 1, and draw AC parallel to DE. Then BC To find its square root :- Produce CB till BF = 1. Bisect CF in G. With G ascentre, and radius GF, draw a semicircle. Draw BH…
Geometrical drawing
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