Abstract
WRITING with reference to the notes on this subject in NATURE of May 8, p. 790, Father J. P. Rowland states: “I greatly regret that by inadvertence I misread in my notes a horizontal force range in minutes of arc, before converting into gammas, as a declination range, and so gave the extreme declination range as 93′, whereas it should be 62’ as given in my letter to The Times. The extreme range in horizontal force, exceeding 620y is correct. There was another notable magnetic disturbance from May 4d 17h to 5d 18h U.T. with ranges in declination and horizontal force of 28’ and 234y respectively, probably associated with an elongated group of sunspots which crossed the central meridian on April 29.”
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Magnetic Disturbances and Auroras. Nature 139, 835 (1937). https://doi.org/10.1038/139835a0
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DOI: https://doi.org/10.1038/139835a0