1 pp 1907
America Transformed: This map, promoting the Rock Island, Frisco, and associated rail lines, illustrates the variety and quantity of agricultural commodities produced in the central third of the country at the beginning of the 20th century. This region, which included much of America's richest agricultural lands, encompassed 37 percent of the country's total land area and 41 percent of its population. It produced over half of the crops of corn, oats, wheat, cotton, rice, and sugar, and livestock of cattle, swine, horses, and mules. Marginal inset maps and pie diagrams demonstrate the geographic extent and percentages of each agricultural product.
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