Excerpt from Induced Radioactivity Excited in Air at the Foot of Waterfalls, And, Some Experiments on the Electrical Conductivity of Atmospheric AirRecalling the experiments of Elster and Geitel, it seems probable that the earth's surface, and possibly too the material used in the construction of their apparatus, are sources of this emanation. As but little evidence
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Induced Radioactivity Excited in Air at the Foot of Waterfalls, And, Some Experiments on the Electrical Conductivity of Atmospheric Air (Classic Reprint)
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