CHAPTER VIII
THE SMALLEST WORKERS
In connection with this chapter the reader will do well to review various earlier portions of the work outlining the general history of the growth of knowledge of electricity and magnetism. For example:
Vol. II., p. 111 seq., for an account of William Gilbert's study of magnetism; pp. 213, 215 describing first electrical machine; and chapter XIV., "The Progress of Electricity from Gilbert and Von Guericke to Franklin," p. 259 seq.
Vol. III., chapter VII., "The Modern Development of Electricity and Magnetism," p. 229 seq.
Vol. V., p. 92 seq., the section on Prof. J. J. Thompson and the nature of electricity.
Other chapters that may be advantageously reviewed in connection with the present one are the following:
Vol. III., chapter VI., "Modern Theories of Heat and Light," p. 206 seq.; chapter VIII., "The Conservation of Energy," p. 253 seq.; and chapter IX., "The Ether and Ponderable Matter," p. 283 seq.
CHAPTER IX
MAN'S NEWEST CO-LABORER: THE DYNAMO