Abstract
DR. CHREE'S letter in NATURE of January 23 corrects an error which it is curious has prevailed so long, and in part forestalls a communication Mr. H. Nagaoka and I had intended to make on the subject of magnetic stress. It might, however, be added that the expression B2/8π used by Dr. More (Phil. Mag., October 1895), and originally given by Mr. S. Bidwell, for the magnetic stress causing changes of length, is incorrect also on another ground, viz. that this quantity is on Maxwell's theory the magnetic stress in air (where, according to the ordinary convention as to dimensions, B = H) and not in iron, where the expression is necessarily of a different form.
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JONES, E. The Stress in Magnetised Iron. Nature 53, 317 (1896). https://doi.org/10.1038/053317a0
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DOI: https://doi.org/10.1038/053317a0
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