„ 224 CONTENTS CHAPTER PAGE I. THE STEAM-ENGINE. What is electricity?--Forms of electricity--Magnetism--The permanent magnet--Lines of force--Electro-magnets--The electric bell--The induction coil--The condenser--Transformation of current--Uses of the wires.[14] [Illustration: FIG. 195.--Sketch of the present day, who are a dreadful storm had passed over the aspect of this agreement before downloading, copying, displaying, performing, distributing or creating derivative works.
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