Issue 8 and Volume 56.

FIRES IN LAKE SUPERIOR IRON MINES Many mine fires have occurred on the Lake Superior iron ranges during the past 25 years. Some of them have resulted in serious loss of life and property. Certain operators, especially those who have experienced losses, realize the danger of underground fires and have adopted preventive and protective measures. There are others, however, who have not given the matter much thought, or who do not appreciate the necessity of special precautions for protecting their mines against fire. This feeling of safety is caused by the fact that many of the mines have had no fires during periods of 20 to 30 years. Except in the discussion of fires in the combustible black slates of the Menominee range, this paper will deal only with fires originating at or near the collar of the shaft, in the shaft, or underground. All statements refer to conditions as…

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