x CONTENTS 



CHAPTER IX 



RELATION OF SPECIFIC INDUCTIVE CAPACITY 

 TO REFRACTIVE INDEX. THE MEASURE- 

 MENT OF SPECIFIC INDUCTIVE CAPACITY 



The relation between specific inductive capacity and refractive index in the 

 electro-magnetic theory of light Determinations of specific inductive 

 capacity Bo'tzmanYs condenser method for solids His experiments with 

 crystalline sulphur Hopkinson's experiments Boltzman-i's experiments on 

 gases Specific inductive capacity of water, alcohol, and other electrolytes 

 Experiments of Cohn and Arons, Rosa, Heerwagen, and Nernst Experi- 

 ments of Dewar and Fleming at low temperatures Drude's experiments with 

 electric waves 1'p. 120-133 



CHARIER X 

 STRESSES IN THE DIELECTRIC 



Tension along the lines of strain Pressure transverse to the lines of strain- 

 Value of the pressure in a simple case This value will maintain equilibrium 

 in any case There maybe other solutions of the problem These stresses 

 will not produce equilibrium if K is not uniform Quincke's experiments 

 General expression for the force on a surface due to the electric tension and 

 pressure The electric stress system is not an elastic stress system and is not 

 accompanied by ordinary elastic strains Pp. 134-141 



CHAPTER XI 



ALTERATIONS OBSERVED IN THE DIELEC- 

 TRIC WHEN IT IS SUBJECTED TO 

 ELECTRIC STRAIN 



Electric expansion in glass Maxwell's electric stresses do not explain the effect 

 Electric expansion of liquids Electric double refraction : The Kerr effect 



Pp. 142-147 



CHAPTER XII 

 PYROELECTRICITY AND PIEZOELECTRICITY 



Pyroelectricifcy Historical notes Analogous and antilogous poles Some methods 

 of investigating pyroelectricity Gaugain's researches Lord Kelvin's theory 

 of pyroelectricity Voigt's experiment on a broken crystal Piezoelectricity 

 The discovery by the brothers Curie The piezoelectric electrometer 



