——­, absolute charge of, 1169. Measures of electricity, galvanometer, 367, note. ——­, voltameter, 704, 736, 739. ——­, metal precipitated, 740, 842.  Measure of specific inductive capacity, 1307, 1600. Measurement of common and voltaic electricities, 361, 860, 1652. ——­ electricity, degree, 736, 738. ——­ ——­ by voltameter, 704, 736, 739. ——­ ——­ by galvanometer, 367, note. ——­ ——­ by metal precipitated, 740, 842.  Mechanical forces affect chemical affinity, 656.  Mercurial terminations for convection, 1581. Mercury, periodide of, an exception to the law of conduction? 691, 1341. ——­, perchloride of, 692, 1341. Metallic contact not necessary for electrolyzation, 879. ——­ not essential to the voltaic current, 879, 887, 915. ——­ its use in the pile, 893, 896.  Metallic poles, 557.  Metal and electrolyte, their state, 946. Metals, adhesion of fluids to, 1038. ——­, their power of inducing combination 564, 608. ——­, ——­ interfered with, 638. ——­, static induction in, 1329, 1332. ——­, different, currents induced in, 193, 211. ——­, generally secondary results of electrolysis, 746. ——­ transfer chemical force, 918. ——­, transference of, 539, 545. ——­ insulate in a certain degree, 1328. ——­, convective currents in, 1603. ——­, but few magnetic, 255.  Model of relation of magnetism and electricity, 116.  Molecular inductive action, 1164, 1669. Motion essential to magneto-electric induction, 39, 217, 256. ——­ across magnetic curves, 217. ——­ of conductor and magnet, relative, 114. ——­ ——­ not necessary, 218.  Moving magnet is electric, 220. Muriatic acid gas, its high insulating power, 1395. ——­, brush in, 1462. ——­, dark discharge in, 1554. ——­, glow in, 1534. ——­, positive and negative brush in, 1476. ——­, spark in, 1422, 1463. ——­, ——­, has no dark interval, 1463, 1555. Muriatic acid decomposed by common electricity, 314. ——­, its electrolysis (primary), 758, 786.

Nascent state, its relation to combination, 658, 717. Natural standard of direction for current, 663. ——­ relation of electrolytic intensity, 987. Nature of the electric current, 1617. ——­ force or forces, 1667. Negative current, none, 1627, 1632. ——­ discharge, 1465, 1484. ——­ ——­, as Spark, 1467, 1482. ——­ ——­, as brush, 1466, 1502. ——­ spark or brush, 1484, 1502. Negative and positive discharge, 1465, 1482, 1525 ——­ in different gases, 1393. New electrical condition of matter, 60, 231, 242, 1114, 1661, 1729. ——­ law of conduction, 380, 394, 410. Nitric acid formed by spark in air, 324. ——­ favours excitation of current, 906, 1138 ——­ ——­ transmission of current, 1020. ——­ is best for excitation of battery, 1137. ——­, nature of its electrolysis, 752. Nitrogen determined to either pole, 554, 748, 752. ——­ a secondary result of electrolysis, 746, 748. ——­, brush in, 1458. ——­, dark discharge in, 1559. ——­, glow in, 1534. ——­, spark in, 1422, 1463. ——­, positive and negative brush in, 1476. ——­, ——­ discharge in, 1512. ——­, its influence on lightning, 1464.  Nomenclature, 662, 1483.  Nonconduction by solid electrolytes, 381, 1358, 1705.  Note on electrical excitation, 1737.  Nuclei, their action, 623, 657.