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 199
c, d, etc. Divide theradius o into a corresponding number of equal parts 1, 2, 3, 4,etc. (Prob. 10). Prom the centre of the circle, with radius 1,draw an arc till it meets the radius a in A, and from 2 till itmeets the radius h in B, and so on till the whole twelve arecompleted. Draw a fair curve… … Fig. 314. described in the preceding problem. Prom the centre of thecircle, with half its radius, draw another circle. The part ofthe spiral contained in this inner circle, i.e. one revolution, willbe drawn precisely the same as the one described in the pre-ceding problem. Divide the outer half of…
Geometrical drawing
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