. Annual report of the United States Geological Survey to the Secretary of the Interior . LIBRARYOF THEUNIVERSITY of ILLINOIS HILL.] DENSITY OF POPULATION. 61 hills, bluffs^- etc., except in the western portion of the area, enables itto support the densest agricultural population of Texas, relative toarea (see fig. 2), and makes it the seat of the most important inlandcities, such as Paris, Bonham, Denison, Sherman, Gainesville, FortWorth, Waco, Weatherford, Taylor, Belton, Temple, Austin, NewBraunfels, San Marcos, and San Antonio. To these soils the Stateowes a large part of her general prosp
. Annual report of the United States Geological Survey to the Secretary of the Interior . LIBRARYOF THEUNIVERSITY of ILLINOIS HILL.] DENSITY OF POPULATION. 61 hills, bluffs^- etc., except in the western portion of the area, enables itto support the densest agricultural population of Texas, relative toarea (see fig. 2), and makes it the seat of the most important inlandcities, such as Paris, Bonham, Denison, Sherman, Gainesville, FortWorth, Waco, Weatherford, Taylor, Belton, Temple, Austin, NewBraunfels, San Marcos, and San Antonio. To these soils the Stateowes a large part of her general prosperity. In addition to the agricultural features the underlying rock sheetsembrace a series of water-bearing strata whose artesian-well conditions. Fig. 2.—Density of population proportionate to geographic and geologic features, shown in per-centages (Census of 1890). (Compare PI. I, p. 26.) are the immediate occasion of this paper. All the factors, agricul-tural, hydrographic, physiographic, and vegetal, however, which deter-mine human habitation, are the direct result of the composition,arrangement, and weathering of the system of chalky rocks (chalkysands, marls, clays, and limestones) which underlie the surface andwhich must necessarily be understood, as described on a later page,before one can gain a correct knowledge of the resources. Altogether these prairies are more comparable in some parts to the 62 BLACK AND GRAND PRAIRIES, TEXAS. downs of England, and in others to the hills of France than to otherregions. So far as the United States is concerned, this country isunique, without analogy or counterpart. In topographic, economic,and cultural aspects it is a distinct geographic region. BELTS OF COUNTRY. Not all the Creta
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