Abstract
THE necessary brevity of the Research Items paragraphs makes it impossible to introduce the reservations and qualifications which would be appropriate in fuller accounts. In the item referred to, the purpose was to direct attention to the main points in a paper by H. S. Hatfield. Reference was made to the earlier work of W. M. Mordey, but full justice could not be done to it. To Mr. Mordey is due full credit for the discovery of the effects in question, and for his admirable investigations of them. His work demonstrated very clearly a dependence on hysteresis. This, however, does not enable an immediate explanation of the effects to be given. In the last part of his Royal Institution lecture, Mr. Mordey appears to admit that he cannot find a satisfactory explanation of the phenomena; and there seems to be no suggestion of an interpretation on the lines proposed by Hatfield. Until Hatfield put forward his convincing and essentially simple explanation of the observed movements of the particles, it seems fair to say that a full explanation of the phenomena had not been given.
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[Letters to Editors]. Nature 135, 509 (1935). https://doi.org/10.1038/135509a0
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DOI: https://doi.org/10.1038/135509a0
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