proximation, 18, 236.
---- by increasing distance, 19, 237.
---- _effective through_ conductors, 1719, 1721, 1735.
---- ---- insulators, 1719, 1722, 1735.
---- in different metals, 193, 202, 211, 213.
---- in the moving earth, 181.
---- in flowing water, 190.
---- in revolving plates, 85, 240.
----, _the induced current, its_ direction, 26, 232.
----, ---- duration, 19, 47, 89.
----, ----, traverses fluids, 20, 23.
----, ----, its intensity in different conductors, 183, 193, 201, 211, 213.
----, ----, not obtained by Leyden discharge, 24.
----, Ampere's results, 78, 255, 379, _note_.
_Induction of a current on itself_, 1048, 1109.
----, apparatus used, 1052.
----, _in a_ long wire, 1064, 1068, 1092, 1118.
----, ---- doubled wire, 1096.
----, ---- helix, 1053, 1061.
---- in doubled helices, 1096.
---- in an electro-magnet, 1056, 1060.
----, wire and helix compared, 1065.
----, short wire, effects with, 1067.
----, action momentary, 1070, 1091, 1100.
----, causes no permanent change in the current, 1071.
----, not due to momentum, 1077.
----, induced current separated, 1078, 1089.
----, _effect at_ breaking contact, 1060, 1081, 1084, 1087.
----, ---- making contact, 1101, 1106.
----, _effects produced_, shock, 1060, 1064, 1079.
----, ---- spark, 1060, 1064, 1080.
----, ---- chemical decomposition, 1084.
----, ---- ignition of wire, 1081, 1104.
----, cause is in the conductor, 1059, 1070.
----, general principles of the action, 1093, 1107.
----, direction of the forces lateral, 1108.
_induction, magnetic_, 255, 1658, 1710.
----, by intermediate particles, 1663, 1710, 1729, 1735.
----, _through_ quiescent bodies, 1712, 1719, 1720, 1735.
----, ---- moving bodies, 1715, 1716, 1719.
---- and magneto-electric, distinguished, 138, 215, 243, 253.
_Induction_, magneto-electric, 27, 58, 81, 140, 193, 1709. _See_ Arago's
magnetic phenomena.
----, magnelectric, 58.
----, electrolytic, 1164, 1345, 1702, 1740.
----, volta-electric, 26.
Inductive capacity, specific, 1167, 1252.
_Inductive force of currents_ lateral, 26, 1108.
----, its nature, 1113, 1660, 1663, 1709.
_Inductive force, lines of_, 1231, 1297, 1304.
----, often curved, 1219, 1224, 1230.
----, exhibited by the brush, 1449.
----, their lateral relation, 1231, 1297, 1304.
----, their relation to magnetism, 1411, 1658, 1709.
Inductometer, differential, 1307, 1317.
Inductric surfaces, 1483.
Inexhaustible nature of the electric current, 1631.
Inseparability