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Browse Illinois Mining Investigations - Illinois State Geological Survey by Subject
Now showing items 3-15 of 15
Subject |
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Carbonization. [1] |
Clay [1] |
Coal [5] |
Coal -- Analysis. [2] |
Coal -- Testing. [1] |
Coal miners [1] |
Coal mines and mining [26] |
Coal trade [1] |
Coke. [1] |
Gas manufacture and works [1] |
Gas manufacture and works. [1] |
Gas power plants. [1] |
Water-gas. [2] |
Now showing items 3-15 of 15