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| CONTENTS. | xix |
Chapter XVI.
Electromagnetic Observations.
| Art. | Page |
|---|---|
| 730. Observation of vibrations | 335 |
| 731. Motion in a logarithmic spiral | 336 |
| 732. Rectilinear oscillations in a resisting medium | 337 |
| 733. Values of successive elongations | 338 |
| 734. Data and quæsita | 338 |
| 735. Position of equilibrium determined from three successive elongations | 338 |
| 736. Determination of the logarithmic decrement | 339 |
| 737. When to stop the experiment | 339 |
| 738. Determination of the time of vibration from three transits | 339 |
| 739. Two series of observations | 340 |
| 740. Correction for amplitude and for damping | 341 |
| 741. Dead beat galvanometer | 341 |
| 742. To measure a constant current with the galvanometer | 342 |
| 743. Best angle of deflexion of a tangent galvanometer | 343 |
| 744. Best method of introducing the current | 343 |
| 745. Measurement of a current by the first elongation | 344 |
| 746. To make a series of observations on a constant current | 345 |
| 747. Method of multiplication for feeble currents | 345 |
| 748. Measurement of a transient current by first elongation | 346 |
| 749. Correction for damping | 347 |
| 750. Series of observations. Zurückwerfungs methode | 348 |
| 751. Method of multiplication | 350 |
Chapter XVII.
Electrical Measurement of Coefficients of Induction.
| 752. Electrical measurement sometimes more accurate than direct measurement | 352 |
| 753. Determination of | 353 |
| 754. Determination of | 354 |
| 755. Determination of the mutual induction of two coils | 354 |
| 756. Determination of the self-induction of a coil | 356 |
| 757. Comparison of the self-induction of two coils | 357 |
Chapter XVIII.
Determination of Resistance in Electromagnetic Measure.
| 758. Definition of resistance | 358 |
| 759. Kirchhoff's method | 358 |
