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Browse Illinois Mining Investigations - Illinois State Geological Survey by Subject
Now showing items 3-15 of 15
| Subject |
|---|
| 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