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Is There “True Magnetism” or Not?

Published online by Cambridge University Press:  14 March 2022

Felix Ehrenhaft  and
Leo Banet
Leo Banet
Affiliation:
350 West 58 Street, New York City
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Extract

According to generally accepted views every material body has always just as much North as South magnetism, meaning that the total value of the North and South magnetism is always zero (div H = 0). One says therefore that there is no “true magnetism”. A body directs itself in the direction of the magnetic lines of force like a compass needle but it does not move from its place. On the other hand, it is known that there are electrically charged bodies (positive or negative electric ions) which move in homogeneous electric fields along the lines of force. There is thus a preponderance of positive or negative electricity on ions. One says also that there exists “true electricity”. A movement of charged matter in a homogeneous field is called a current. Consequently until now electric currents were known to exist, but no magnetic currents.

Type
Research Article
Information
Philosophy of Science , Volume 8 , Issue 3 , July 1941 , pp. 458 - 462
Copyright
Copyright © The Philosophy of Science Association 1941

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References

(1) Ehrenhaft, F., Comptes rendus (Paris), t. 190, 263, 1930.Google Scholar
(2) Ehrenhaft, F., Phys. Zeitschr., 31, 478, 1930.Google Scholar
(3) Ehrenhaft, F., Philos. Mag., 11, 140, 1931.10.1080/14786443109461670CrossRefGoogle Scholar
(4) Reeger, E., Zeitschr. f. Phys., 71, 646, 1931.10.1007/BF01339573CrossRefGoogle Scholar
(5) Ehrenhaft, F., Journ. Frankl. Inst, 230, 381, 1940.10.1016/S0016-0032(40)90516-6CrossRefGoogle Scholar
(6) Ehrenhaft, F., Letter to the Editor of the Nature, London, “Stationary Electric and Magnetic Fields in Beams of Light.” Vol. 147, p. 25, Jan. 4, 1941.Google Scholar
(7) Ehrenhaft, F. and Banet, L., Letter to the Editor of the Nature, London, “Magnetization of Matter by Light.” Vol. 147, p. 297, March 8, 1941.Google Scholar
(8) Maxwell, J. C., Treatise on Electricity and Magnetism, Art. 377-379, Edition Oxford, 1904.Google Scholar
(9) Peregrinus, P., De Magnete, etc., Chapter V, Letter from August 12, anno 1269.Google Scholar
(10) Norman, R., The New Attractive, etc., Chapter VI, anno 1576.Google Scholar
(11) Gilbert, W., De Magnete, etc., Book IV, Chapter VI, anno 1628.Google Scholar
(12) Ehrenhaft, F., Akad. Anz. X, der Akad. d. Wissensch. Wien, April 21, 1910; and Sitz. Ber. d. Akad. d. Wiss. Wien CXIX (IIa), May 1910, 817.Google Scholar
(13) Morichini, D., Gilb. Ann. Phys., 43, 212, 1813, and 46, 367, 1814.Google Scholar
(14) Sommerville, M., Gilb. Ann. Phys., 82, 493, 1826.10.1002/andp.18260820411CrossRefGoogle Scholar
(15) Baumgartner, v., Gilb. Ann. Phys., 85, 508, 1827.Google Scholar
(16) Zantedeschi, F., Gilb. Ann. Phys., 92, 187, 1829.10.1002/andp.18290920522CrossRefGoogle Scholar
(17) Ehrenhaft, F., Ann. de Physique (Paris), 13, 151, 1940.10.1051/anphys/194011130151CrossRefGoogle Scholar