[5] Wiedemann's Annalen, 36, p. 1, 1889; or in his republished Papers, "Electric Waves," p. 137, English translation by D. E. Jones.
[6] The fraction 7/22 here denotes a stranded wire formed of seven strands, each single wire having a diameter expressed by the number 22 on the British standard wire gauge.
[7] G. Marconi, "Syntonic Wireless Telegraphy," Journal of the Society of Arts, Vol. XLIX., p. 501, 1901.
[8] Instruction for the manufacture of large induction coils may be obtained from a "Treatise on the Construction of Large Induction Coils," by A. T. Hare. (Methuen & Co., London.)
Also see Vol. II. of "The Alternate-Current Transformer," by J. A. Fleming, chap. I. ("The Electrician" Printing and Publishing Co., 1, 2 and 3, Salisbury-court, Fleet-street, London, E.C.)
[9] See "The Alternate-Current Transformer," by J. A. Fleming. Vol. I., p. 184.
[10] Du Moncel states that MacGauley of Dublin independently invented the form of hammer break as now used. See "The Alternate-Current Transformer," Vol. II. chap. I. J. A. Fleming.
[11] See Professor J. Trowbridge, "On the Induction Coil" Phil. Mag., April, 1902 Vol. III., Series 6, p. 393.
[12] See Dr. Wehnelt's article in the Elektrotechnische Zeitschrift, January, 1899.
[13] See The Electrician, Vol. XLII., 1899, pp. 721, 728, 731, 732 and 841; communications from Mr. Campbell Swinton, Professor S. P. Thompson, Dr. Marchant, the author and others; also p. 864, same volume, for a leader on the subject; also p. 870, letters by M. Blondel and Professor E. Thomson. See also The Electrician, Vol. XLIII., p. 5, 1899, extracts from a Paper by P. Barry; Comptes Rendus, April, 1899. See also the Electrical Review, Vol. XLIV., p. 235, 1899, February 17.