CONTENTS 



PART I: STATIC ELECTRICITY 



CHAFrER I 



GENERAL ACCOUNT OF COMMON 

 PHENOMENA 



Electrification by friction Actions between bodies both electrified by friction 

 Two kinds of electrification Law of electric mechanical action Electric 

 actions not magnetic Conduction and insulation Gold-loaf electroscope 

 Electrification by induction Detection of kind of charge by the electro- 

 scopeNature of induced electrification Only the outer surface of a con- 

 ductor is charged The two electrifications always occur together, inducing 

 each other Discharge of electrification Frictional machines Ease of dis- 

 charge from points I. i^htningconductors Electrophorus Bennett's doubler 

 Belli's machine Holtz's machine Wimshurst's machine The Leydi-nj.tr 

 Franklin's jar Residual charge Pp. 1-23 



CHAPTER II 



QUANTITY OF ELECTRIFICATION 



Use of the electroscope to indicate equality of charge The two electrifications 

 always appear or di>api-ar in equal amounts whether the electrification is 

 by friction, by conduction, by induction, or by supply from current 

 Electrification resides only on the outside surface of a conductor unless it 

 contain-, insulated charged bodies An insulated charged conductor inside a 

 hollow conductor induces an equal and opposite charge on the inside and an 

 equal like charge on the outside Imagined construction of multiples and 

 Bubraultiples of an arbitrary unit of charge Imagined method of measuring 

 any charge in terms of this unit Pp. 24-30 



CHAFIER III 



PROPOSITIONS APPLYING TO 

 44 INVERSE SQUARE " SYSTEMS 



The inverse square law The field Unit quantity Intensity Force between 

 quantities 7/4 and 7 2 Lines of force and tubes of force Gauss's theorem 

 If a tube of force starts from a given charge it either continues indefinitely 



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