Flame favours convectivc discharge, 1580. 
Flowing water, electric currents in, 190. 
Fluid terminations for convection, 1581. 
Fluids, their adhesion to metals, 1038. 
Fluoride of lead, hot, conducts well, 1340.
Force, chemical, local, 947, 959, 1739.
——­, circulating, 917, 947, 996, 1120.
Force, electric, nature of, 1163, 1667.
——­, inductive, of currents, its nature, 60, 1113, 1735.
Forces, electric, two, 1163.
——­, inseparable, 1163, 1177, 1244, 1627.
——­ and chemical, are the same, 877, 916.
——­ and magnetic, relation of, 1411, 1653, 1658, 1709.
——­ ——­, are they essentially different? 1663, 1731.
Forces, exciting, of voltaic apparatus, 887, 916.
——­, exalted, 905, 994, 1138, 1148.
Forces, polar, 1665.
——­ of the current, direct, 1620.
——­ ——­, lateral or transverse, 1653, 1709.
Form, its influence on induction, 1302, 1374.
——­ discharge, 1372, 1374. 
Fox, his terrestrial electric currents, 187.
Friction electricity, its characters, 284.
——­, excitement by, 1744. 
Fusion, conduction consequent upon, 394, 402. 
Fusinieri, on combination effected by platina, 613.

Galvanometer, affected by common electricity, 289, 366. ——­, a correct measure of electricity, 367, note. Gases, their elasticity, 626, 657. ——­, conducting power, 1336. ——­, insulating power, 1381, 1507. ——­, ——­ not alike, 1395, 1508. ——­, specific inductive capacity, 1283, 1290. ——­, ——­ alike in all, 1292. ——­, specific influence on brush and spark, 1463, 1687. ——­, discharge, disruptive, through, 1381. ——­, brush in, 1454. ——­, spark in, 1421. ——­, positive and negative brushes in, 1475. ——­, ——­, their differences, 1476. ——­, positive and negative discharge in, 1393, 1506, 1687. ——­, solubility of, in cases of electrolyzation, 717, 728. ——­, from water, spontaneous recombination of, 566. ——­, mixtures of, affected by platina plates, 571. ——­, mixed, relation of their particles, 625. General principles of definite electrolytic action, 822. ——­ remarks on voltaic batteries, 1031, 1136. ——­ results as to conduction, 443. ——­ ——­ induction, 1295. Glass, its conducting power, 1239. ——­, its specific inductive capacity, 1271. ——­, its attraction for air, 622. ——­, ——­ water, 1251. Globe, revolving of Barlow, effects explained, 137, 160. ——­, is magnetic, 164. Glow, 1405, 1525. ——­, produced, 1527. ——­, positive, 1527. ——­, negative, 1530. ——­, favoured by rarefaction of air, 1529. ——­, is a continuous charge of air, 1526, 1537, 1543. ——­, occurs in all gases, 1534. ——­, accompanied by a wind, 1535. ——­, its nature, 1543, ——­, discharge, 1526. ——­, brush and spark relation of, 1533, 1538, 1539, 1542.  Grotthuss’ theory of electro-chemical decomposition, 481, 499, 515. Growth of a brush, 1437. ——­ spark, 1553.