—, —, on the causes of the diversity in the length of sparks erroneously distinguished by the terms positive and negative, xxxii, 275.f
—, electrical brush, xxxii, 277.f
—, electric induction, and letters to Faraday on, xxxviii, 1; xli, 1.
—, — —, M. Faraday in reply to, xxxix, 108; xlii, 291.
—, electrical machine, plate, vii, 108f; (large) xxxii, 272.f
—, — —, on the error that they must communicate with the earth, xxiv, 253.
—, electrometer, single leaf, vii, 351f; viii, 99; xxv, 136.f
—, —, modification of the single leaf, xxv, 136.f
—, electrometer, use of, as an electric discriminator, xxv, 136.
—, electro-magnetic and galvanic experiments, viii, 145.