A Treatise on Electricity and Magnetism, Vol. II (1873) - Page 24

Article (space) Page
696. Potential energy of two circular currents .. .. .. .. 302
697. Moment of the force original: "couple" acting between two coils .. .. .. 303
698. Values of $Q_i'$ .. .. .. .. .. .. .. .. .. 303
699. Attraction between two parallel circular currents .. .. .. 304
700. Calculation of the coefficients for a coil of finite cross-section .. .. 304
701. Potential of two parallel circles expressed by elliptic integrals .. 305
702. Lines of force around a circular current. Fig. XVIII .. .. 307
703. Differential equation of the potential of two circles .. .. 307
704. Approximation when the circles are very near one another .. 309
705. Further approximation .. .. .. .. .. .. .. 310
706. Coil of maximum self-induction .. .. .. .. .. .. 311

CHAPTER XV.

ELECTROMAGNETIC INSTRUMENTS.

707. Standard galvanometers Instruments used to detect and measure small electric currents. and sensitive galvanometers .. .. 313
708. Construction of a standard coil .. .. .. .. .. .. 314
709. Mathematical theory of the galvanometer .. .. .. .. 315
710. Principle of the tangent galvanometer and the sine galvanometer .. .. .. .. .. .. .. .. .. .. .. 316
711. Galvanometer with a single coil .. .. .. .. .. .. 316
712. Gaugain’s eccentric suspension .. .. .. .. .. .. 317
713. Helmholtz’s double coil. Fig. XIX .. .. .. .. .. 318
714. Galvanometer with four coils .. .. .. .. .. .. 319
715. Galvanometer with three coils .. .. .. .. .. .. 319
716. Proper thickness of the wire of a galvanometer .. .. .. 321
717. Sensitive galvanometers .. .. .. .. .. .. .. 322
718. Theory of the galvanometer of greatest sensibility .. .. .. 322
719. Law of thickness of the wire .. .. .. .. .. .. 323
720. Galvanometer with wire of uniform thickness .. .. .. .. 325
721. Suspended coils. Mode of suspension .. .. .. .. .. 326
722. Thomson’s sensitive coil .. .. .. .. .. .. .. 326
723. Determination of magnetic force by means of suspended coil and tangent galvanometer .. .. .. .. .. .. .. 327
724. Thomson’s suspended coil and galvanometer combined .. .. 328
725. Weber’s electrodynamometer An instrument for measuring electric current by the interaction of two coils. .. .. .. .. .. .. 328
726. Joule’s current-weigher .. .. .. .. .. .. .. 332
727. Suction of solenoids The mechanical force pulling a magnetic core into a coil of wire. .. .. .. .. .. .. .. .. 333
728. Uniform force perpendicular original: "normal" to suspended coil .. .. .. .. .. 333
729. Electrodynamometer with torsion-arm .. .. .. .. .. 334