The Use of Permissible Explosives in the Coal Mines of Illinois (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from The Use of Permissible Explosives in the Coal Mines of Illinois

The study of mine air, mine fires, and the use of explosives is being continued, and the coking and gas-producing qualities of Illinois coals are being investigated. A detailed investigation of subsidence in Illinois is being undertaken jointly by the parties to the agreement.

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