INDEX. 



789 



Medium, dielectrical, 99; energy of, 

 107. 



Megohm, 613. 



Meridian, magnetic, 305. 



Merit, figure of, 878. 



Metals, resistance of, 998, 1291. 



Mho, the unit of conductivity, 928. 



Mhometer, 928. 



Microfarad, 613. 



Microhm, 613. 



Microphone, 545. 



Mirror method, 662, 667. 



Mirrors, concave, 671. 



Mixed machines, 1257. 



Moment, electrical, 143 ; magnetic, 

 143, 297 ; magnetic of the earth, 

 439; of inertia, 700, 701; experi- 

 mental determination of, 703. 



Moon, its influence on the earth's mag- 

 netism, 441. 



Motion, aperiodic, 685 ; oscillatory 

 equations of, 675 ; pendulum, 677. 



Motors, electrical, 566. 



Multiplication, method of, 882. 



Multiplier, 826. 



Murphy's method, 83, 802; application 

 of, 150. 



Mutual induction, coefficient of, 519, 

 755; of two coils, 762, 763, 770; of 

 two currents, 775. 



N 



NATURAL magnets, 288. 



Needles, astatic, 841 ; fish-back, 852 ; 



dielectric, in a variable field, 182. 

 Network of conductors, properties of a, 



943- 

 Neumann's formula, 353, 623 ; theorem, 



512, 517; theory, 626. 

 Neutral state, I ; point, 279. 

 Nickel, magnetisation of, 1207. 

 Nobili's galvanometer, 847. 

 Numerical constants, 1290. 



OBSERVATIONS, correction of, 893. 

 CErsted's experiment, 442. 



Ohm, 613; legal, 920, 1128. 



Ohm's theory, 200 ; law, 204, 245. 



Opposition, method of, 1010. 



Optical power, 659 ; galvanometer, 914. 



Oscillations, isochromous, 676, 681 ; 

 measurement of electrical works and 

 potential by, 820; measurement of 

 currents by, 830; electrical, 911, 

 1069; of a magnetic needle, 1140; 

 duration of, 676 ; damping of, 678 ; 

 observation of, 689. 



PACINOTTI'S discovery, 1262. 



Parallax, error of, 661. 



Parallel currents, 480, 756; magnetic, 



434- 



Parallelogram of resistances, 942. 

 Parallelopipedon, moment of inertia of 



a, 701. 



Paramagnetic bodies, 374, 402. 

 Peltier effect, 247, 286, 1032; electro- 

 meter, 799. 

 Pendulum, motion of, 677 ; vibrations 



of, reduced to infinitely small angles, 



691. 



' Penetration, angle of, 659. 

 Periodic motion, 675. 

 Peristaltic induction, 551. 

 Permanent states, superposition of, 202 ; 



magnetisation, 406. 

 Permeability, magnetic, 383, 1200. 

 Phenomena, electrocapillary, 270; of 



inversion, 272. 

 Phenomenon, Peltier's, 247, 286 ; 



Hall's, 640. 

 Photophone, 545. 

 Piezoelectricity, 1081. 

 Piles, 264. 



Pixii's machine, 1253. 

 Plane of polarization, 143 ; condensers, 



81. 



Plante's accumulators, 1249. 

 Platymeter, 1047. 

 Pohl's gyrotrope, 973. 

 Points, power of, 62; neutral, 279; 



consequent of a magnet, 449. 



EEE 2 



