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 338
l to fn. Join Icli and lig. Then likg is the anglebetween the two planes P and Q required. likg is a triangle with an altitude equal to fit!, rotated on theline lig till it coincides with the H.P. lilLg is the H. projectionof this triangle in its proper position. Pkoblem 100. To find the traces of… … planes. At h erect a perpendicular till it meets the V.T. in If.Draw any line cd at right angles to ah, and intersecting it in g.With h as centre, and radii hg and ha, draw arcs till they meetXY in e and/. Join/6. At e draw the line eV perpendicular tofh. Set off from g, towards a, gh equal to el.…
Geometrical drawing
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