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doi: 10.1038/049078b0
MR. ELLIS, in his letter (NATURE, November 9), has discussed the coincidence between Carrington's observation of a solar outburst in 1859 and the magnetic movements observed at Kew and Greenwich. He comes to the conclusion that the disturbance of the magnets corresponding to this outburst was small, and that, although many greater magnetic movements have occurred since, no corresponding manifestation has been seen, although the sun has been so closely watched.
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