The next natural division comprises the oval depression lying between the great central watershed and the high range which runs straight north from Rio within a few hundred miles of the coast. This is the Sao Francisco valley. Politically and commercially connected is the adjacent coast-plain. Valley and plain are divided into the four states of Minas, Bahia, Sergipe, and Espirito Santo, with 430,000 square miles and 6,000,000 inhabitants. In the coast-plain the rainfall is greater than farther north, and the soil is very fertile, producing not only cotton, sugar, and tobacco, but coffee, maize, and mandioc. The slopes are more abrupt and the mountains begin closer to the sea. The interior is a great plateau traversed by high mountain ranges and the tributaries of the Sao Francisco River. Most of this plateau is included in the great state of Minas, the most populous member of the Brazilian union, which is agriculturally self-sufficing, and one of the great mineral regions of the world. The rainfall is abundant, the climate is healthful and bracing, the birth-rate is large, and the region is admirably adapted to the white races. Its general character is a rolling plateau, three to four thousand feet above the ocean, forming extensive, treeless plains, which are interspersed with wooded mountain chains, river valleys, and extensive tracts of brush-land. The European who visits the Sao Francisco valley is astonished to find a country where the climate is temperate and the soil fitted to the production of all sorts of food crops including the cereals, and where, nevertheless, proximity to the equator makes practicable a multiplicity of crops in a single year. The coast-plain, which forms the greatest part of Bahia, Sergipe, and Espirito Santo, is fertile, but the climate is enervating to Europeans, and the proportion of black blood there is the largest in Brazil. About the twentieth degree the mountains approach close to the coast, and from Victoria south to the thirtieth degree the Atlantic border of Brazil is steep and mountainous, often rising directly from the sea to a height of two thousand to six thousand feet. It is a coast of splendid harbours and magnificent scenery. The drainage is mostly inland into the Plate system, and water falling within a dozen miles of the ocean flows 2500 miles before reaching the sea.