[13] J. J. Thomson, Electricity and Magnetism, § 205.

[14] Maxwell, Electricity and Magnetism, § 431.

[15] H. du Bois, Electrician, 1898, 40, 317.

[16] M. Faraday, Exp. Res. xxii., xxiii.; W. Thomson, Reprint, § 604; J. C. Maxwell, Treatise, § 435; E. Mascart and J. Joubert, Electricity and Magnetism, §§ 384, 396, 1226; A. Winkelmann, Physik, v. 287.

[17] See A. Winkelmann, Physik, v. 69-94; Mascart and Joubert. Electricity and Magnetism, ii. 617.

[18] Sci. Abs. A, 1906, 9, 225.

[19] See C. G. Lamb, Proc. Phys. Soc., 1899, 16, 517.

[20] Soc. Franc. Phys. Séances, 1904, 1, 27.

[21] E. G. Warburg, Wied. Ann. 1881, 13, 141; Ewing, Phil. Trans., 1885, 176, 549; Hopkinson, Phil. Trans. 1885, 176, 466. For a simple proof, see Ewing, Magnetic Induction (1900), p. 99. Hopkinson pointed out that the greatest dissipation of energy which can be caused by a to-and-fro reversal is approximately represented by Coercive force × maximum induction /π.

[22] Magnetic Induction, 1900, 378.