The two hundred experiments given can be performed with simple, inexpensive apparatus; in fact, the student should make at least a part of his own apparatus. For the benefit of those who wish to make their own apparatus, the author has given, throughout the work, explanations that will aid in the construction of certain pieces especially adapted to these experiments. For those who have the author's "How Two Boys Made Their Own Electrical Apparatus," constant references have been made to it as the "Apparatus Book," as this contains full details for making almost all kinds of simple apparatus needed in "The Study of Elementary Electricity and Magnetism by Experiment." THOMAS M. ST. JOHN. _New York, April, 1900._ The Study of Elementary Electricity and Magnetism by Experiment PART I--MAGNETISM PART II--STATIC ELECTRICITY PART III--CURRENT ELECTRICITY The Study of Elementary Electricity and Magnetism by Experiment. TABLE OF CONTENTS. PART I.--MAGNETISM. PAGE. CHAPTER I. =Iron and Steel= 3 Introduction.--Kinds of iron and steel.--Exp. 1, To study steel.--Discussion.--Exp. 2, To find whether a piece of hard steel can be made softer.--Annealing.--Exp. 3, To find whether a piece of annealed steel can be hardened.--Hardening; Tempering.--Exp. 4, To test the hardening properties of soft iron.--Discussion. CHAPTER II. =Magnets= 7