Abstract
IN the paper referred to by Dr. Dorsey, I discussed how a lightning flash is propagated from a positively charged cloud. In that paper, of set purpose, I did not discuss how the ionisation takes place, relying on the simple statement that ionisation does take place when and where the field exceeds a certain unspecified minimum value. I did this to avoid discussion of details which were unessential to the main purpose of the paper. But as Dr. Dorsey now raises these questions they must be considered, although the correspondence columns of NATURE are not appropriate for the full discussion which they really require. I must therefore be content with a few remarks on his main points.
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SIMPSON, G. Lightning. Nature 118, 191 (1926). https://doi.org/10.1038/118191a0
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DOI: https://doi.org/10.1038/118191a0
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