Chapter II: =Magnets= 7

Kinds of magnets.--Exp. 5, To study the horseshoe magnet.--Poles;
Equator.--Exp. 6, To ascertain the nature of substances attracted
by a magnet.--Magnetic Bodies; Diamagnetic Bodies.--Practical
Uses of Magnets.--Exp. 7, To study the action of magnetism
through various substances.--Magnetic Transparency; Magnetic
Screens.--Exp. 8, To find whether a magnet can give magnetism
to a piece of steel.--Discussion; Bar Magnets.--Exp. 9, To make
small magnets.--Exp. 10, To find whether a freely-swinging bar
magnet tends to point in any particular direction.--North-seeking
Poles; South-seeking Poles; Pointing Power.--The Magnetic
Needle; The Compass.--Exp. 11, To study the action of magnets
upon each other.--Exp. 12, To study the action of a magnet upon
soft iron.--Laws of Attraction and Repulsion.--Exp. 13, To
learn how to produce a desired pole at a given end of a piece
of steel.--Rule for Poles.--Our Compass.--Review; Magnetic
Problems.--Exp. 14, To find whether the poles of a magnet
can be reversed.--Discussion; Reversal of Poles.--Exp. 15,
To find whether we can make a magnet with two N poles.--Exp.
16, To study the bar magnet with two N poles.--Discussion;
Consequent Poles.--Exp. 17, To study consequent poles. Exp.
18, To study the theory of magnetism.--Theory of Magnetism;
Magnetic Saturation.--Exp. 19, To find whether soft iron
will permanently retain magnetism.--Retentivity or Coercive
Force; Residual Magnetism.--Exp. 20, To test the retentivity
of soft steel.--Discussion.--Exp. 21, To test the retentivity
of hard steel.--Exp. 22, To test the effect of heat upon a
magnet.--Discussion.--Exp. 23, To test the effect of breaking a
magnet.--Discussion.

CHAPTER III. =Induced Magnetism= 20

Exp. 24, To find whether we can magnetize a piece of iron
without touching it with a magnet.--Temporary Magnetism;
Induced Magnetism.--Exp. 25, To find whether a piece of steel
can be permanently magnetized by induction.--Exp. 26, To
study the inductive action of a magnet upon a piece of soft
iron.--Polarization; Pole Pieces.--Exps. 27-30, To study pole
pieces.

CHAPTER IV. =The Magnetic Field= 23

Exp. 31, To study the space around the magnet, in
which pieces of iron become temporary magnets by
induction.--Discussion; The Magnetic Field.--Exp. 32, To
study the magnetic field of a bar magnet.--Magnetic Figures;
Lines of Magnetic Force.--Exps. 33-37, To study
the magnetic fields of various combinations of bar magnets.--Exps.
38-39, To study the lifting power of combinations
of bar magnets.--Discussion; Compound Magnets.--Exps.
40-42, To study the magnetic field of the
horseshoe magnet.--Discussion; Resistance to Lines of
Force.--Exp. 43, To show that lines of force are on all
sides of a magnet.--Discussion.--Exp. 44, To study a
horseshoe magnet with movable poles.--Discussion; Advantages
of Horseshoe Magnets.

CHAPTER V. =Terrestrial Magnetism= 31

The Magnetism of the Earth.--Declination.--Exp. 45, To study
the lines of force above and below a bar magnet placed
horizontally.--The Dip or Inclination of the Magnetic
Needle.--Exp. 46, To study the dip or inclination of the magnetic
needle due to the action of the earth.--Discussion; Balancing
Magnetic Needles.--Exps. 47-48, To study the inductive influence
of the earth.--Discussion.--Natural Magnets.--Exp. 49, To test
the effect of twisting a wire held north and south in the earth's
magnetic field.--Exp. 50, To test for magnetism in bars of iron,
tools, etc.

PART II.--STATIC ELECTRICITY.

CHAPTER VI. =Electrification= 39

Some Varieties of Electricity.--Exp. 51-52, To study
electrification by friction.--Discussion.--Electrified and
Neutral bodies.--Force; Resistance; Work; Potential Energy;
Electrification.--Heat and Electrification.--Exps. 53-54, To
study electrical attraction.--Discussion.--Exp. 55, To study
mutual attractions.--Mutual Attractions.--Exps. 56-58, To study
electrical repulsions.--The Carbon Electroscope.--Discussion of
Experiments 56, 57, 58.--Exp. 59, To study the electrification
of glass.--Questions.--Exp. 60, To compare the electrification
produced by ebonite and flannel with that produced by glass and
silk.--Discussion.--Laws.

CHAPTER VII. =Insulators and Conductors= 47

Exps. 61-63, To study insulators.--Conductors.--Exp.
64, To study conduction.--Discussion.--Exp. 65,
To study conduction.--Telegraph line using static
electricity.--Discussion.--Relation between conductors and
insulators.--Electrics and Non-electrics.--Exp. 66, To study the
effect of moisture upon an insulator.--Discussion.--Exp. 67, To
test the effects of moisture upon bodies to be electrified.

CHAPTER VIII. =Charging and Discharging Conductors= 52

The Electrophorus.--Exp. 68, To learn how to use the
electrophorus.--Exp. 69, To study "charging by conduction."--Exp.
70, To study potential; Electromotive force.--Pressure;
Potential; Electromotive force; Current, Spark.--Theories about
Electrifications.--Exp. 71, To study some methods of discharging
an electrified body.--Disruptive, Conductive and Convective
Discharges.--Exp. 72, To study intermittent or step-by-step
discharges.--Discussion.--Exp. 73, To ascertain the location of
the charge upon an electrified conductor.--Discussion.--Hollow
and Solid Conductors.--Exp. 74, To study the effect of points
upon a charged conductor.--Electric Density.--Electric Wind.

CHAPTER IX. =Induced Electrification= 60

Electric Fields; Lines of Force.--Exp. 75, To study
electric induction.--Electric Polarization; Theory of
Induction.--Exp. 76, To learn how to charge a body by
induction.--Free and Bound Electrifications.--Exp. 77, To
show that a neutral body is polarized before it is attracted
by a charged one.--Polarization Precedes Attraction.--Exp.
78, To find whether electric induction will act through an
insulator.--Dielectrics.--Exp. 79, To find whether a polarized
conductor can act inductively upon another conductor.--Successive
Induction.--Inductive Capacity.--Exp. 80, To study the action of
the electrophorus.--Discussion.--Details of action.--Exp. 81,
To see, hear, and feel the results of inductive influence and
polarization.--Discussion.