Practical plane and solid geometry for advanced students, including graphic statics, adapted to the requirements of the South Kensington syllabus (1899)
Harrison, Joseph, Baxandall, George Albert · London Macmillan · leaf 210
picture the drawing as nowcoinciding with the horizontal plane, and conceive theground line to be an edge view of the vertical plane, as ifthe model of the planes were viewed directly downwardsfrom above. This at once leads to the rule— Rule 2.—A point A is situated in front of or behindthe… … •■s Y i^£\^ \ (4) x \a! (L y X b W y X \c y X d u- y This method of reading a drawing is often conducive toclearness of conception, and should be cultivated by thestudent. Instead of the planes of projection being imaginedas turned into coincidence, they are conceived as retainingtheir horizontal…
