CHAPTER XXI. CHEMICAL EFFECTS OF THE ELECTRIC CURRENT 151
Chemical Action and Electricity.--Electrolysis.--Exp. 147, To study the electrolysis of water.--Composition of Water.--Electromotive Force of Polarization.--Exp. 148, To coat iron with copper.--Exp. 149, To study the electrolysis of a solution of copper sulphate.--Electroplating.--Exp. 150, To study the chemistry of electroplating.--Discussion.--Electrotyping.--Voltameters.--Exp. 151, To study the construction and action of a simple "storage" cell.--Secondary or Storage Cells.
Electromagnetism.--Exp. 152, To study the lines of force about a straight wire carrying a current.--Ampere's Rule.--Lines of Force About Parallel Wires.--Exp. 153, To study the lines of force about a coil of wire like that upon the galvanoscope.--Exp. 154, To study the magnetic field about a small coil of wire.--Coils.--Polarity of Coils.--Exp. 155, To test the attracting and "sucking" power of a magnetized coil or helix.--Exp. 156, To find whether a piece of steel can be permanently magnetized by an electric current.--Exp. 157, To study the effect of a piece of iron placed inside of a magnetized coil of wire.
Electromagnets.--Cores of Electromagnets.--Exps. 158-163, To study straight electromagnets; Lifting power; Residual magnetism of core; Magnetic tick; Magnetic figures; Magnetic field.--Horseshoe Electromagnets.--Use of Yoke.--Experimental Magnets.--Method of Joining Coils.--Exps. 164-173, To study horseshoe electromagnets; To test the poles; To study the inductive action of one core upon the other; Magnetic figures; Permanent Magnetic Figures; Lifting power; Residual magnetism when magnetic circuit is closed.--Closed Magnetic Circuits.
Exp. 174, To find whether electricity can be produced by heat.--Home-made Thermopile.--Thermoelectricity.--Peltier Effect.--Thermopiles.
Electromagnetic Induction.--Exp. 175, To find whether a current can be generated with a bar magnet and a hollow coil of wire.--Discussion.--Induced Currents and Work.--Exp. 176, To find whether a current can be generated with a bar magnet and a coil of wire having an iron core.--Exp. 177, To find whether a current can be generated with a horseshoe magnet and a coil of wire having an iron core.--Induced Currents and Lines of Force.--Exp. 178, To find whether a current can be generated with an electromagnet and a hollow coil of wire.--Exp. 179, To find whether a current can be generated with an electromagnet and a coil of wire having an iron core.--Discussion of Exps. 178-179.--Exp. 180, To study the effect of starting or stopping a current near a coil of wire or other closed circuit.--Exp. 181, To study the effect of starting or stopping a current in a coil placed inside of another coil.--Discussion of Exps. 180-181.--Direction of Induced Current.--Laws of Induction.--Primary and Secondary Currents.--Exp. 182, To see what is meant by alternating currents.--Direct and Alternating Currents.--Self-induction; Extra Currents.