1621, 1703, 1706.
----, previous induction, 1345, 1351.
----, necessary intensity, 912, 966, 1346, 1354.
----, division of the electrolyte, 1347, 1704.
----, stopped by solidifying the electrolyte, 380, 1358, 1705.
----, facilitated by added bodies, 1355.
----, in curved lines, 521, 1216, 1351.
----, proves action of contiguous particles, 1349.
----, positive and negative, 1525.
----, velocity of electric current in, 1650.
----, related to convective discharge, 1622.
----, theory of, 1344, 1622, 1704.
Discharging train generally used, 292.
Disruptive discharge, 1405. _See_ Discharge, disruptive.
Dissimulated electricity, 1684.
_Distance, its influence_ in induction, 1303, 1364,1371.
---- over disruptive discharge, 1364, 1371.
Distant chemical actions, connected and opposed, 891, 909.
Distinction of magnetic and magneto-electric action, 138, 215, 243, 253.
Division of a charge by inductive apparatus, 1208.
Doebereiner on combination effected by platina, 609, 610.
Dulong and Thenard on combination by platina and solids, 609, 611.
Dust, charge of its particles, 1567.

Earth, natural magneto-electric induction in, 181, 190, 192.
_Elasticity of_ gases, 626.
---- gaseous particles, 658.
_Electric_ brush, 1425. _See_ Brush, electric.
---- condition of particles of matter, 862, 1669.
---- conduction, 1320. _See_ Conduction.
---- _current_ defined, 283, 511.
---- ----, nature of, 511, 1617, 1627.
---- ----. _See_ Current, electric.
---- ----, _induction of_, 6, 232, 241, 1048, 1101. _See_ Induction of
electric current.
---- ----, ----, on itself, 1048.
---- discharge, 1319. _See_ Discharge.
---- force, nature of, 1667. _See_ Forces.
---- induction, 1162. _See_ Induction.
---- inductive capacity, 1252. _See_ Specific inductive capacity.
---- polarity, 1685. _See_ Polarity, electric.
---- spark, 1406. _See_ Spark, electric.
---- and magnetic forces, their relation, 118, 1411, 1653, 1658, 1709,
1731.
Electrics, charge of, 1171, 1247.
_Electrical_ excitation, 1737. _See_ Excitation.
---- machine generally used, 290.
---- battery generally used, 291.
---- and chemical forces identical, 877, 917, 947, 960, 965, 1031.
_Electricities_, their identity, however excited, 265, 360.
----, one or two, 516, 1667.
----, _two_, 1163.
----, ----, their independent existence, 1168.
----, ----, their inseparability, 1168, 1177, 1244.
----, ----, never separated in the current, 1628.
_Electricity_, quantity of, in matter, 852,