. Die medizinische und chirurgische Verwendung von Elektrizität : einschließlich der Röntgenstrahlung, Finsen Licht, Vibrationstherapeutika und Hochfrequenzströme . bestanden, und erstreckt sich auf die innere Beschichtung. Wenn nun entweder positive oder negative Elektrizität an den Knopf oben übertragen wird, wird sie über die gesamte innere Beschichtung diffundiert; und durch ihre induktive Infusion nimmt die äußere Beschichtung die entgegengesetzte Art an. DER LEYDEN-KRUG. 17 Wenn in diesem Zustand – die beiden Beschichtungen sind gegensätzlich elektrifiziert – wird gesagt, dass das Glas geladen ist; und eine Entladung findet statt, wenn eine Kommunikation zwischen dem hergestellt wird

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. The medical and surgical uses of electricity : including the X-ray, Finsen light, vibratory therapeutics, and high-frequency currents . passed, and extends to the inside coating. Now, when either positiveor negative electricity is communicated to the knob at the top, it is mime-diately diffused over the whole inside coating; and by its inductive influ-ence the outside coating takes on the opposite kind. THE LEYDEN JAR. 17 When in this state—the two coatings being oppositely electrified—thejar is said to be charged; and a discharge takes place when a communica-tion is established between the knob and the outside coating, the equilib-rium being restored with a bright flash of light and a sharp report. As the human system is a good conductor, this discharge may takeplace through it by grasping the outside coating with one hand andtouching the knob at the top with the other; or several persons may forma line by grasping hands, the one atone extreme touching the outside coat-ing, while the one at the other extreme touches the knob. All will feelthe shock, as it is called, at the same instant. While the jar is receiving. Fig. 14. the charge, it must not be insulated—that is, the outside must communi-cate with the earth. As the positive charge collects on the inside, theoutside becomes negative by the expulsion of the positive charge, and theaccumulation of the negative charge in its stead, drawn from the earth.But if the outside is insulated, these transfers to and from it cannot takeplace, and therefore the jar cannot become charged. A submarine cable is really a vast Leyden jar. The wire constitutesthe interior coating, the water the exterior coating, and the gutta-perchathe insulator between them. On this account the passage of an electriccurrent through a submarine cable is greatly retarded. If it is desired to accumulate a very great charge of electricity, a num-ber of jars must be employed, all their inner coatings being connected to-gether, and all their ou

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• bookauthorrockwell
• bookcentury1900
• bookdecade1900
• bookyear1903