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Ice-Caves of France and Switzerland Chapter 19 ON THE MEAN TEMPERATURE OF THE REGIONS IN WHICH THE GLACIèRES OCCUR. 
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Ice-Caves of France and Switzerland Chapter 19 ON THE MEAN TEMPERATURE OF THE REGIONS IN WHICH THE GLACIèRES OCCUR. Chapter 19 ON THE MEAN TEMPERATURE OF THE REGIONS IN WHICH THE GLACIèRES OCCUR.
Many interesting experiments have for long been carried on with a view to determine the mean temperature at various depths below the surface of the earth. The construction of Artesian wells has afforded useful opportunities for increasing the amount of our knowledge on this subject; and the well at Pregny, near Geneva,[211] and the Monk Wearmouth c
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