— —, —, combining the advantages of the trough of Cruikshank with the deflagrator, xxxii, 285.f
— —, of great power, F. W. de Moleyns, xliv, 357.
— —, J. Henry, on a spark from a long conductor uniting the poles of, xxviii, 327.
— —, —, action of a spiral conductor, xxviii, 329.
— —, C. G. Page, on iron or any metal a substitute for copper, xxxii, 197.
— —, —, on the benefit of fresh immersion, xxxvi, 137.f
— —, W. B. and H. D. Rogers, experimental enquiry into some of the laws of, xxvii, 39.f
— —, —, relative influences of the zinc and copper, xxvii, 41.
— —, —, examination of Ritchie's law of surface, xxvii, 53.
— —, —, influence of temperature, xxvii, 57.