Source: “The New World: Problems in Political Geography” by Isaiah Bowman, pages 234 and 260, 1921.
Some information about the author of the book:
Isaiah Bowman, AB, Ph. D. (1878 - 1950) was an American geographer. He was educated at Harvard and Yale where he taught from 1905 to 1915, after which time he became the director of the American Geographical Society, a position he held for 20 years from 1915 to 1935. He was chief territorial adviser to President Woodrow Wilson at the Versailles conference and served the Department of State as territorial adviser in World War Two. Some of his more notable works include:
Forest Physiography (1911)
Well-Drilling Methods (1911)
South America (1915)
The Andes of Southern Peru (1916)
The New World-Problems in Political Geography (1921)