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