PART I.

ELECTROSTATICS.

CHAPTER I.

DESCRIPTION OF PHENOMENA.

Article		Page
27.	Electrification by friction. Electrification is of two kinds, to which the names of Vitreous original: "Vitreous" (glass-like) and Resinous original: "Resinous" (amber-like), or Positive and Negative, have been given	30
28.	Electrification by induction The process by which a conductor becomes electrified when placed near a charged body	31
29.	Electrification by conduction. Conductors and insulators	32
30.	In electrification by friction, the quantity of positive electrification is equal to that of the negative electrification	33
31.	How to charge a vessel with a quantity of electricity equal and opposite to that of an excited body	33
32.	How to discharge a conductor completely into a metallic vessel	34
33.	Testing electrification using a gold-leaf electroscope	34
34.	Electrification, when considered as a measurable quantity, may be called Electricity	35
35.	Electricity may be treated as a physical quantity	36
36.	The theory of Two Fluids An early theory suggesting electricity consisted of two distinct fluids, "vitreous" and "resinous"	37
37.	The theory of One Fluid Benjamin Franklin's theory that electricity is a single fluid that flows from one body to another	39
38.	Measurement of the force between electrified bodies	40
39.	The relationship between this force and the quantities of electricity	41
40.	How the force varies according to the distance	42
41, 42.	Definition of the electrostatic unit of electricity—Its dimensions	42
43.	Proof of the law of electric force	43
44.	The electric field	44
45.	Electric potential	45
46.	Equipotential surfaces. An example of their use in reasoning about electricity	45
47.	Lines of force	47
48.	Electric tension	47
49.	Electromotive force	47
50.	The capacity of a conductor	48
51.	Properties of bodies—Resistance	48