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 83
U. S. GEOLOGICAL SURVEY PilEPARATION OF ILLUSTRATIONS PLATE IX … TONS IS70 I87S 1880 1885 1890 1895 1900 1905 I9i0 1915 60,000.000 200.000 "" Mil 'III 1 1 1 1 1 1 1 1 1 • I 1 "111 (III III! i / S5,C00,CC0 1 / 250.000 /' 1 so.coc.ooo «/■. 2 j t- 45.000.000 j 1 200.009 II 11911 1 S 40,000.000 2 2 35.000,000 /\ 160.000 '\ o 30,000,000 //. ii / / JJ 25,000,000 ' 'i…
Topographical drawing · Map drawing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
