[54] See the Electrical Review, Vol. XLIV., 1899, May 26; Wied Ann., Vol. LXVIII., p. 92; or German Patent Specification No. 107,843.
[55] U.S.A. Patent Specification No. 706,742, 1902.
[56] See British Patent Specification, G. Marconi, No. 12,039, June 2, 1896.
[57] See G. Marconi, British Patent Specification No. 12,326, of June 1, 1898.
[58] See the Electrical Review, September 26, 1902, Vol. LI., p. 543.
[59] There is a good deal of contradiction between various inventors on this point, some saying that "earthed" aerials obviate atmospheric electrical disturbances, and others that insulated aerials are in this respect superior. The truth appears to be that, neither form is absolutely free from risk of disturbance by this cause.
[60] The capacity of an electrical circuit corresponds to the elastic pliability, or what is commonly called the elasticity, of a material substance, and the inductance to mass or inertia. Hence capacity and inductance are qualities of an electric circuit which are analogous to the elasticity and inertia of such a body as a heavy spring.
[61] See Cantor Lectures, on "Electrical Oscillations and Electric Waves," delivered before the Society of Arts, London, November 26, December 4, 10, 17, 1900. Lecture I., p. 12, of reprint.
[62] A fuller account of these experiments was given by the author in a letter to the London Times published on April 14, 1903.
[63] See Journal of the Society of Arts, Vol. XLIX., p. 505. "Syntonic Wireless Telegraphy," by G. Marconi.