[53] Proc. Phys. Soc., 1888, 9, 181.
[54] C.R., 1892, 115, 805; 1894, 118, 796 and 859.
[55] Elekt. Zeits., 1894, 15, 194.
[56] Phil. Mag., 1900, 50, 1.
[57] Phil. Trans., 1903, 201, 1.
[58] Phil. Mag., 1904, 8, 179.
[59] A. M. Thiessen (Phys., 1899, 8, 65) and G. Claude (C. R., 1899, 129, 409) found that for considerable inductions (B = 15,000) the permeability and hysteresis-loss remained nearly constant down to -186°; for weak inductions both notably diminished with temperature.
[60] Proc. Roy. Soc., 1898, 62, 210.
[61] C.R., 1895, 120, 263.
[62] Amer. Journ. Sci., 1898, 5, 245.