pile, 884, 931, 941. ——­, transference of, 525. Amalgamated zinc, its condition, 1000. ——­, how prepared, 863. ——­, its valuable use, 863, 999. ——­ battery, 1001. Ammonia, nature of its electrolysis, 748. ——­, solution of, a bad conductor, 554, 748.  Ampere’s inductive results, 78, 255, 379 note. Anions defined, 665, 824. ——­, table of, 847. ——­ related through the entire circuit, 963. ——­, their action in the voltaic pile, 924. ——­, their direction of transfer, 962, Anode defined, 663. Antimony, its relation to magneto-electric induction, 139. ——­, chloride of, not an electrolyte, 690, 796. ——­, oxide of, how affected by the electric current, 801. ——­ supposed new protoxide, 693. ——­ ——­, sulphuret, 694. Animal electricity, its general characters considered, 351. ——­ is identical with other electricities, 354, 360. ——­, its chemical force, 355. ——­, enormous amount, 359. ——­, evolution of heat, 353, ——­, magnetic force, 351. ——­, physiological effects, 357. ——­, spark, 358. ——­, tension, 352.  Apparatus, inductive, 1187. See Inductive apparatus. Arago’s magnetic phenomena, their nature, 81, 120. ——­, reason why no effect if no motion, 126, ——­, direction of motion accounted for, 121. ——­, due to induced electric currents, 119, 248. ——­, like electro-magnetic rotations in principle, 121. ——­, not due to direct induction of magnetism, 128, 138, 215, 243, 248. ——­, obtained with electro-magnets, 129. ——­, produced by conductors only, 130, 215. ——­, time an element in, 124. ——­, Babbage and Hershel’s results explained, 127.  Arago’s experiment, Sturgeon’s form of, 219.  Associated voltaic circles, 989. Atmospheric balls of fire, 1611. ——­, electricity, its chemical action, 336.  Atomic number judged of from electrochemical equivalent, 851. Atoms of matter, 869, 1703. ——­, their electric power, 856, 860.  Attraction of particles, its influence in Doebereiner’s phenomena, 619. Attractions, electric, their force, 1022 note. ——­, chemic, produce current force, 852, 918, 947, 996, 1741. ——­, ——­ local force, 852, 921, 947, 959, 1739. ——­, hygrometric, 621.  Aurora borealis referred to magneto-electric induction, 192.  Axis of power, the electric current on, 517, 1627, 1642.

Balls of fire, atmospheric, 1611.  Barlow’s revolving globe, magnetic effects explained, 137, 160.  Barry, decomposed bodies by atmospheric electricity, 338.  Bases and acids, their relation in the pile, 927.  Battery, Leyden, that generally used, 291. Battery, voltaic, its nature, 856, 989. ——­, origin of its power, 878, 989. ——­, ——­ not in contact, 887, 915, ——­, ——­ chemical, 879, 916, 919, 1741. ——­, ——­, oxidation of the zinc, 919, 944. ——­, its circulating force, 858, 1120. ——­, its local force, 1120. ——­, quantity of electricity circulating, 990. ——­, intensity of electricity circulating, 990, 993. ——­, intensity of its current, 909, 994. ——­, ——­ increased, 905, 989. ——­,