A practical hand-book of drawing for modern methods of reproduction (1894)
Harper, Charles G. (Charles George), 1863-1943 author · London : Chapman & Hall, Ld. · leaf 151
WASH DRAWINGS. A, B, C, D. This frame being made, a diagonal line should be lightly ruled from upper to lower corner, either — as shown — -from B to C, or from A to D. The … measurement of the proposed reduction should then be marked off upon the base line at E, and a perpendicular line ruled from it to meet the diagonal. The point of contact, F, gives the height that was to be found, and a
Illustration of books · Drawing -- Reproduction
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
