— —, —, deflagrator, iii, 105f; iv, 201; v, 94; vi, 337; vii, 347f; viii, 99; ix, 181; xl, 48.
— —, — —, improved form of, M. Faraday, xxxii, 170.
— —, —, 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.