, 1288.
_Alkali_ has strong exciting power in voltaic 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