CONTENTS.

PART III.

Article		Page
371.	Properties of a magnet when acted on by the earth	1
372.	Definition of the axis of the magnet and of the direction of magnetic force	1
373.	Action of magnets on one another. Law of magnetic force	2
374.	Definition of magnetic units and their dimensions In physics, "dimensions" refers to the fundamental units like mass, length, and time that compose a measurement.	3
375.	Nature of the evidence for the law of magnetic force	4
376.	Magnetism as a mathematical quantity	4
377.	The quantities of the opposite kinds of magnetism in a magnet are always exactly equal	4
378.	Effects of breaking a magnet	5
379.	A magnet is built up of particles each of which is a magnet	5
380.	Theory of magnetic ‘matter’ A historical theoretical model treating magnetism as a fluid or substance distributed within a body.	5
381.	Magnetization is of the nature of a vector A quantity having both magnitude and direction.	7
382.	Meaning of the term ‘Magnetic Polarization’	8
383.	Properties of a magnetic particle	8
384.	Definitions of Magnetic Moment, Intensity of Magnetization, and Components of Magnetization	8
385.	Potential of a magnetized element of volume	9
386.	Potential of a magnet of finite size. Two expressions for this potential, corresponding respectively to the theory of polarization, and to that of magnetic ‘matter’	9
387.	Investigation of the action of one magnetic particle on another	10
388.	Particular cases	12
389.	Potential energy of a magnet in any field of force	14
390.	On the magnetic moment and axis of a magnet	15

812246 Library accession number.