DEEP MINING
Great advance in deep level raining is the result of the advance iu engineering science. Some years ago three thousand feet was considered a great depth, hut this-limit hits been much exceeded. At Flenu, Belgium, thirty-six hundred feet has been touched, while at Calumet, Hecla and Tamarack, in the United States, mines from forty-five hundred to fifty-four hundred feet have been worked. The temperature is the groat thing to- bo overcome.
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Bibliographic details
New Zealand Times, Volume LXXVII, Issue 5372, 3 September 1904, Page 10
Word Count
73DEEP MINING New Zealand Times, Volume LXXVII, Issue 5372, 3 September 1904, Page 10
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