— - — —, —, electrotome, xxxv, 112f, 253.f
— - — —, —, reciprocating armature engine, xxxv, 263.f
— - — —, —, with vibrating armature, xxxv, 267.f
— - — —, —, circular galvanometers, xxxv, 259f;
–with double helix for inducing magnetism, xxxv, 261.f
— - — —, —, electrepeter, new form of, xxxiii, 377f; xxxv, 112.f
— - — —, W. H. Pepys, vii, 195.
— - — —, M. Pixii, xxiv, 144, 146f, 196.
— - — —, J. B. Zabriskie, model of engine, xxxii, 313.f
— - — —, —, rotating, xxxvi, 129.f