Steam Steel and Electricity

its modern uses possible.--The universal wire.--Conductors and

non conductors.--Electricity an exception in the ordinary Laws

of Nature.--A dual nature: "Positive" and "Negative."--All

modern uses come under the law of Induction.--Some of the laws

of this induction.--Magnets and Magnetism.--Relationship between

the two.--Magnetic "poles."--Practical explanation of the action

of induction.--The Induction Coil.--Dynamic and Static

Electricity.--The Electric Telegraph.--First attempts.--Morse,

and his beginnings.--The first Telegraph Line.--Vail, and the

invention of the dot-and-dash alphabet.--The old instruments and

the new.--The final simplicity of the telegraph.