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 265
Produce the line dt above XY, and make c-p equal in lengthto the diameter ah. P)isect cp in d!, With (fas centre, andradius equal to pa, draw a circle. Draw ah through d till it 244 SOLID GEOMETRY meets the circle in a and ?/. Through cV draw the line cf atan angle of 45° with ah, till it meets the… … centre, and radius p^, draw a circle. This is the plan of theparallel eg. To avoid confusion, the projectors for half of one meridianonly are shown ; but they are all found in the same manner. Erect a perpendicular on point h till it meets the equator inpoint k; also from point I till it meets the…
Geometrical drawing
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