A Treatise on Electricity: In Theory and Practice, Svazek 1Longman, Brown, Green, and Longmans, 1853 |
Obsah
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Ampère Ampère's angle apparatus attraction axis ball bismuth centre charged circuit circular communication conducting body consequently contrary direction copper Coulomb crystals cylinder determine deviation diamagnetic diameter disc distance effect electric current electrised body electro-magnet electroscope employed equal equilibrium exercised experiment exterior extremity fact Faraday fixed fluids galvanometer glass gum-lac helix horizontal inches induced currents induced discharge influence insulating intensity interior inverse latter length Leyden jar liquid magnetic force magnetic meridian magnetised bar magnetised needle manner means mercury metal molecular movable conductor movable current movement mutual action nature netised neutralise north pole obtained occurs oscillations parallel particles perpendicular phenomena pile placed plane plate polarisation position produced proof-plane quantity of electricity repelled repulsion rotation rotatory soft iron solenoïd south pole steel stratum substance surface terrestrial magnetism theory torsion torsion balance traversed tricity vertical voltaic voltaic pile whilst wire zinc
Oblíbené pasáže
Strana 16 - However, we may for the present say that it is very probable that electricity, instead of consisting of one or two special fluids sui generis, is nothing more than the result of a particular modification in the state of bodies. This modification probably depends on the mutual action exercised on each other by the ponderable particles of matter and the subtle lluid that surrounds them on every side — a fluid that is generally designated by the name of ether, and the undulations of which constitute...
Strana 488 - ... heat was conducted differently along and across the fibre of organic bodies, and Plucker imagined it probable that the direction of the fibres might influence the magnetic or dia-magnetic properties of a body, or that the packing together of the particles would determine one or the other condition, ' when the molecular constitution of any body is * such that the particles of which it is formed are nearer to each * other, according to a certain direction, than in the rest of the 'mass, this direction,...
Strana 130 - ... atmospheric pressure to play a part in the phenomena. This fact, on the other hand, is very well explained by admitting that the electricities are retained, in the portions of the surfaces where they are distributed, by the insulating ^effect of the film of air that remains adjacent, and...
Strana 318 - Electricity," 1853, to give his theoretical views upon magnetism in the following remarkable words : — "The whole of the magnetic molecular phenomena that we have been studying lead us to believe that the magnetisation of a body is due to a particular arrangement of its molecules, originally endowed with magnetic virtue, but which in the natural state are so arranged that the magnetism 01" thi body that they constitute is not apparent.
Strana 360 - ... either from the centre to the circumference, or from the circumference to the centre, as the direction of the rotation of the plate was one way or the other.
Strana 311 - ... whatever be the manner in which it is curved, forming small filaments of the sixth or eighth of an inch in length, which present opposite poles at their two extremities. When the conducting wire is free, these filaments, instead of remaining rectilinear, join together by their two edges and...
Strana 15 - The former, although subject to strong objections, is, however, in the present state of the science, a very convenient and tolerably exact manner of representing to ourselves this agent, that we term electricity : it is under this point of view that we shall adopt it. However, we may for the present say it is very probable that electricity, instead of consisting of one or of two special fluids sui generis, VOL.
Strana 319 - The whole of the magnetic molecular phenomena that we have^been studying lead us to believe that the magnetisation of a body is due to a particular arrangement of its molecules, originally endowed with magnetic virtue, but which in the natural state are so arranged that the magnetism of the body that they constitute is not apparent. Magnetism would therefore consist in disturbing this state of equilibrium, or in giving to the particles an arrangement that makes manifest the property with which they...
Strana 107 - When the jar is to be charged, it is held in the hand by the outer coating, and the knob K is brought near to the conductor of the electrical machine.
Strana 28 - This pile is found to be charged with negative electricity at its lower extremity, which is copper, and with positive electricity at its top, which is zinc.