Lessons in Electricity; To Which Is Added an Elementary Lecture on Magnetism

Lessons in Electricity; To Which Is Added an Elementary Lecture on Magnetism

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 edition. Excerpt: ... with it the results obtained with the tin-foil, tin, ' and. foolscap. Thus by the simplest means we illustrate great principles. The withdrawal of the electricity from the electroscope, by lowering the plate oi glass, so as to bring the electricity of the upper coating within the grasp of th- lower one, is sometimes called " condensation. ' The electricity on one plate or sheet was figured as squeezed together, r condensed, by the attraction of the other. A special instrument called a condenser is constructed by instrument makers to illustrate the action here explained. You may readily make a condenser for yourself. Take two circles, p P', fig. 41, of tin or of sheet zinc, and support the one, p', by a stick of sealing-wax or glass, G: the other, p, by a metal stem, connected with the earth. The insulated plate, p', is called, the collecting plate; the uninsulated one, p, the condensing plate. Connect the collecting plate with your electroscope by the wire w, and bring tha condensing plate near it, leaving, how ever, a thin space of air between them. Charge the collector, p7, or the wire, w, with your glass rod, until the leaves of ihe electroscope begin to diverge. Withdraw the condensing plate, the leaves fly asunder; bring the condensing plate near, the leaves again collapse. Or vary your construction, and make your condenser thus. Employing the.mile, or a sheet of foolscap if the table be an insulator, as one plate of the condenser, spread upon it the sheet of india rubber, P, fig. 42, -and lay upon the rubber the sheet of block-tin, A B. Connect the tin by the wire, w, with the electroscope, T. Impart electricity to the little weight, A, till the leaves, L, begin to diverge; then lift the tin plate by its two silk loops; the...show more

Product details

  • Paperback | 32 pages
  • 189 x 246 x 2mm | 77g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236614658
  • 9781236614650