ON July 20 the London Branch of the Institute of Physics visited the Royal Meteorological Society at South Kensington to take part in a discussion on “Thunderstorm Problems”. Sir George Simpson, president of the Royal Meteorological Society, was in the chair—a happy arrangement, for Sir George has been working at thunderstorms for nearly forty years; his classical work in India, which included the experiments on which the breaking–drop theory of the production of electricity is based, was published so long ago as 1909 and his most recent papers on the subject describe work of equal importance.

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WHIPPLE, F. THUNDERSTORM PROBLEMS. Nature 148, 305–307 (1941) doi:10.1038/148305a0

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