Publisher's Synopsis
Excerpt from The Coal Resources Of The World, Vol. 3: An Inquiry Made Upon The Initiative Of The Executive Committee Of The XII International Geological Congress, Canada, 1913; With The Assistance Of Geological Surveys And Mining Geologists Of Different Countries
In Jutland, only a few small mining experiments have been undertaken, and a few experimental borings made to no great depth; one boring has been carried down to 78 m., but 111 most cases of boring for coal the depth reached has not been greater than 20 - 30 m. From the surface.
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