Magnetic Fields of Force; An Exposition of the Phenomena of Magnetism, Electro-Magnetism and Induction Based on the Conception of Lines of Force

Magnetic Fields of Force; An Exposition of the Phenomena of Magnetism, Electro-Magnetism and Induction Based on the Conception of Lines of Force

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1897 edition. Excerpt: ...in the surrounding medium. Rotatory motions about the magnetic lines of force are in reality capable of furnishing a mechanical explanation of the fundamental phenomena in question. The rotation in two neighbouring tubes being in the same sense, the particles at their peripheries, where they are in contact, will be moving in opposite directions, and it might appear as if the motions must mutually disturb one another. We know, however, from the phenomena of vortexmotion in a frictionless fluid that such rotatory movements may be: (a) permanent, and (b) in ju.vtaposition.--Motions of this form, which were first accurately studied by HELMHOLTZ, may under certain conditions become permanent motions of the kind here considered. Since they constitute the best dynamical illustration of the kinetic theory of the field, we shall generate them in a fluid medium which can be made to fall in drops (water), and also in a compressible fiuid (air). The resulting phenomena are indeed only approximations to those which are assumed in our theory of the magnetic field, for there are two conditions which must be fulfilled by our ideal medium, and which are not fulfilled by the substances used in our experiments. These conditions are: (a) Frictionlessness, or freedom from viscosity. (,8) Incompressibility. Water possesses a certain degree of viscosity, so that the energy of the motion considered is gradually reduced to nothing; while air, in addition to having viscosity, is highly compressible. But the phenomena of vortex motion in these fluids may be made to furnish quite satisfactory analogues of lines of force, bundles of lines, and tubes of force 129. Generation of vortices in water---Vortex motion is produced in a fluid (possessing some viscosity) when...show more

Product details

  • Paperback | 106 pages
  • 189 x 246 x 6mm | 204g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236979915
  • 9781236979919