A map from 1912 of the United States showing the principal industries of the region. The map is color-coded to show the areas of fishing grounds, industrial centers, coal mining areas, petroleum fields, and iron ore fields. This map shows the centers of production in 1900 for cotton, maize, wheat, oats, six cereals, and manufactures, and shows the general areas of agricultural production (wheat, livestock, wool, cotton, fruit, wine, and tobacco), forestry (lumber, hardwoods, pine, spruce, cedar, and redwood), and mining (gold, silver, copper, and sulphur).