The preparation of illustrations for reports of the United States Geological survey : with brief descriptions of processes of reproduction (1920)
Ridgway, John L. (John Livesy), b. 1859, United States. Dept. of the Interior, Geological Survey (U.S.) · Washington, D.C. : Government Printing Office · leaf 57
49 PREPAKATIOISr OF ILLUSTRATIOlSrS. lines are drawn very close together is likely to be unsatisfactory be- cause, though the spaces between the lines are reduced in width, the lines themselves may show no corresponding reduction in thickness. … i^.- D c Figure 6. — Methods of expressing relief: (A) by contour lines, (B) by hachures, (C) by shading on stipple board, and (D) by a brush drawing. Tfee four examples given rep- resent the same area. The drawings were made twice the size of the printed cuts. Certain contour lines are commonly…
Topographical drawing · Map drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
