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

United States Coal Fields, 1901
A map from 1901 of the United States showing the coal fields and coal bearing districts in the United States....

Coal Mining Regions of the United States, 1904
Coal mining regions of the United States....

Iron Mining, 1904
Iron ore mining regions of the United States....

Gold and Silver Mining Regions of the United States, 1904
Gold and silver mining regions of the United States....

Coal Mining Regions of the United States, 1906
Coal producing regions of the United States....

Iron Mining, 1906
Iron ore regions of the United States....

Gold and Silver Mining Regions of the United States, 1906
Gold and silver mining regions of the United States....

Coal and Iron Deposits in the United States, 1910
A map from 1910 of the contiguous United States showing the regions of iron coal deposits. The map is keyed to show deposits of iron ore, lignite coal, bituminous coal, and anthracite coal in the region....

Mineral Regions of the United States, 1910
A map from 1910 of the United States showing the regions of mineral resources. The map is keyed to show areas of gas and petroleum resources, gold and silver deposits, and copper deposits....