—, iron, lead and other metals, a substitute for copper in galvanic apparatus, xxxii, 197.
—, on the use of the dynamic multiplier, xxxii, 354.f
—, musical tones from magnets, xxxii, 396; xxxiii, 118; xlviii, 401.
—, electro-magnetic apparatus and experiments, xxxiii, 190.f
—, — - — experiments on the application of electro-magnetism as a moving power, xxxiii, 118, 190f; xxxv, 106.
—, rotary multiplier, or astatic galvanometer, xxxiii, 376.f
—, new form of electrepeter, xxxiii, 377.f
—, new magnetic electrical machine of great power, with two parallel horse-shoe magnets and two straight rotating armatures, with experimental researches, xxxiv, 163.f
—, ibid, fusion of iron filings by, xxxiv, 169.
—, compound electro-magnets for the magnetic electrical spark, shock and decomposition, xxxiv, 364.