A text-book on chemistryFor the use of schools and colleges . Fig. Describe Figs. 89 and , demonstrate? What does the electrical stool, Fig. INDUCTION. 129 LECTURE XXVI. Theory of Electrical Induction. — Phenomena ofInduction.—Independent of Shape.—Permanent Ex-citement by Induction.—Takes place through Glass.—Experiments illustrative of Attraction and Pepul-sion, and Induction.—Medicated Tubes. There are many ways in which electrical excitementcan be developed. In the common machine it is byfriction; in the tourmaline, a crystallized gem, by heat;and in other cases by chemical actio
A text-book on chemistryFor the use of schools and colleges . Fig. Describe Figs. 89 and , demonstrate? What does the electrical stool, Fig. INDUCTION. 129 LECTURE XXVI. Theory of Electrical Induction. — Phenomena ofInduction.—Independent of Shape.—Permanent Ex-citement by Induction.—Takes place through Glass.—Experiments illustrative of Attraction and Pepul-sion, and Induction.—Medicated Tubes. There are many ways in which electrical excitementcan be developed. In the common machine it is byfriction; in the tourmaline, a crystallized gem, by heat;and in other cases by chemical action, and by conducetion. Electrical disturbance also very often-arises frominduction. By the term electrical induction, we mean that a bodywhich is already excited tends to disturb the conditionof others in its neighborhood, inducing in them an elec-trical condition. Thus, let a, Fig. 92, be the terminal ball of the primeconductor, and a few inches Fiffm 92> off let there be placed a sec-ondary conductor, b c, ofbrass, supported on a glassstand, and at e
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