Galvanic battery, _E. de Butts_, viii, 271.^f ---- ----, of carbon, xxxix, 132. ---- ----, ----, _B. Silliman, Jr._, xliii, 393; xliv, 180.^f ---- ----, _A. Crosse's_, some account of, xxxii, 372; xxxv, 135.^f ---- ----, _A. Dela Rive's_, v, 395. ---- ----, dry, xii, 195; xvii, 162. ---- ----, _Grove's_, xxxviii, 116. ---- ----, ----, experiments with, _S. F. B. Morse_, xlv, 390.^f ---- ----, _R. Hare's_ new modifications of, iii, 105.^f ---- ----, ----, calorimotor, i, 413^f; v, 94, 357, 364; vi, 337; xxxii, 284.^f ---- ----, ----, deflagrator, iii, 105^f; iv, 201; v, 94^f; vi, 337; vii, 347^f; 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. ---- ----, ----, examination of _Ritchie's_ law of surface, xxvii, 53. ---- ----, ----, influence of temperature, xxvii, 57. ---- ----, _J. B. Rogers_ and _J. Green_, ibid, xxviii, 33. ---- ----, ----, relative importance of the zinc and copper, xxviii, 34. ---- ----, ----, relative distance of the plates, xxviii, 39. ---- ----, ----, deflecting power from different menstrua, xxviii, 40. ---- ----, _W. Sturgeon_, difference in the effects of the two polar wires, xxxix, 31.^f ---- ----, _Watkins's_ dry, xvii, 162. ---- blasting, _R. Hare_, xxi, 139; xxvi, 352^f; xxxviii, 188. ---- ----, _H. K. G. Morgan_, xxxviii, 33. ---- calorimotor, _Hare's_, i, 413^f; v, 94, 357, 364; vi, 337; xxxii, 284.^f ---- ----, for galvano-ignition apparatus, _R. Hare_, xxxii, 284.^f ---- circle, theory of, _T. Graham_, xxxviii, 117. ---- currents, caloric a cause of, _J. P. Emmet_, xxv, 269. ---- ----, remarks on, xviii, 199.^f ---- ---- and sparks from the horse-shoe magnet, _J. P. Emmet_, xxiv, 78.^f ---- deflagrator, _Hare's_, iii, 105^f; iv, 201; v, 94^f; vi, 337; vii, 347^f; viii, 99; ix, 181; xl, 48. ---- ----, improved form of, _M. Faraday_, xxxii, 170. ---- experiments by _A. Crosse_, producing crystals, and, as supposed, insects, xxxv, 125.^f ---- ---- by _R. Hare_, viii, 145. ---- ---- with grasshopper's legs, J. W. Bailey, xxxi, 292.^f ---- ignition of gunpowder, _R. Hare_, xxxvii, 269. ---- induction, _J. P. Emmet_, xxvi, 23.^f ---- lamp, an improvement in, _J. Cutbush_, ii, 332.