Production of Coal in the United States,
Production of coal in the United States. ...

Production of Petroleum in the United States,
Production of petroleum in the United States. ...

Production of Iron in the United States,
Production of iron in the United States. ...

The United States - Coal Fields, 1897
A map from 1897 of the United States showing the region of coal deposits and coal production....

Coal Fields, 1898
The Coal Fields in the contiguous 48 states as of 1898. "The mines of the United States are among its most valuable resources, and yield about one third of the mineral product of the world. By far the most valuable of the mineral productions are...

Coal Regions, 1899
The United States' coal-producing regions 1899. ...

Iron Regions, 1899
The United States' Iron Regions. ...

Coal , 1899
Coal regions of United States,coded to show amounts of coal mined in tons. ...

Iron Ore, 1899
Iron ore regions of United States, coded to show amounts of iron ore mined in tons. ...

Gold, 1899
Gold mining in the United States, coded to show amounts of mined in ounces. ...