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AT a joint meeting of the Institution of Mechanical Engineers and the Institution of Chemical Engineers held on May 17, a paper entitled “Engineering Problems associated with the Improvement
of Temperature and Humidity Conditions of the Atmosphere in Mines at Great Depths” was presented by Dr. J. H. Dobson and Dr. W. J. Walker. In it were raised points of world-wide importance
in connexion with mining operations which are carried on where wet bulb temperatures of mine atmospheric air approach 90° F. and approximate to normal blood temperatures. The task of the
engineer is to produce satisfactory conditions for underground workers in these extremely difficult conditions, and the authors explained the complexity of the problem and gave a brief
account of the research which has been devoted to it.
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