— - — currents, A. de la Rive, xxxiv, 6.
— - — disc of Arago, xxiv, 143.
— - — induction, see [Electro-dynamic.]
— - — and magneto-electric formula, xxxv, 356.f
— - — properties of metalliferous veins, R. W. Fox, xx, 136.
— - — telegraph, S. F. B. Morse's, xxxiii, 185.f
— - — —, see farther, [Magneto-electric.]
Electro-magnetism, early experiments in, iii, 383; v, 391.
— - —, experiments in, J. H. Abbot, xl, 104.f
— - —, J. P. Emmet's discoveries (magneto-electric) in, xxiv, 78f; xxvi, 311; xxviii, 331.