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.