Burn, Robert Scott · London : Ingram, Cooke, and Co. · leaf 81
found in its outline by a similar process. First join the two lower cornersby a line ab, draw the diagonals ac, bd; from their intersection draw efpassing through the centre of ab at g. Draw fa, fb, divide each of theminto three parts, and through each division draw lines from a and b to… … fig. 39, at that side, draw visual lines to the point of sight; find, as before, the per-spective point, f, of each arch by diagonals ; draw the perspective lines fa,fb} divide each of them into three parts, through the divisions draw lines from g, intersecting the visual lines at — points which…
Drawing · Wood-engraving
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.
