THE CONQUEST OF NATURE 



history of the growth of knowledge of electricity and magnetism. 

 For example: 



Vol. II., p. in seq.j 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 Elec- 

 tricity 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 con- 

 nection 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 



The references just given for chapter VIII. apply equally here. 

 The experiments of Oersted and Faraday are detailed in vol. 

 III., p. 236 seq. 



CHAPTER X 



NIAGARA IN HARNESS 



Same references as for chapters VIII. and IX. 

 CHAPTER XI 



THE BANISHMENT OF NIGHT 



(p. 221). Davy and the electric light. The quotation here 

 given is reproduced from vol. III., pp. 234, 235. The very great 

 importance and general interest of the subject seem to justify the 

 repetition, descriptive of this first electric light. Davy's original 

 paper was given at the Royal Institution in 1810. 



(p. 237). "Peter Cooper Hewitt Inventor," by Ray Stan- 

 nard Baker, in McClure's Magazine, June, 1903, p. 172. 



In connection with the problem of color of the light emitted by 



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