What people are saying - Write a review
We haven't found any reviews in the usual places.
Other editions - View all
according active antimony apparatus appears arrangement assumed atoms attraction becomes bismuth bodies cadmium cause centre charged chemical action circle circuit cold conducting conductors connected consequence considered consistent continued copper described dilute direction effect electric current electricity electrolyte equal evident excited exist experiments facts fish fluid force former further galvanometer gave give given glass hands heat helix inches increase induction influence iron kind lead magnet matter means mercury metal motion move nature needle negative nitric acid observed obtained opposite oxide particles pass phenomena Philosophical piece plate platinum pole positive present probably produced reason referred relation rendered respect round shock side silver solution steam strong substance sulphuret of potassium sulphuric supposed surface theory thermo tion tube voltaic volume weak whilst wire zinc
Page 288 - What do we know, he asks, of the atom apart from its force ? You imagine a nucleus which may be called a, and surround it by forces which may be called m ; 'to my mind the a or nucleus vanishes, and the substance consists in the powers of m.
Page 284 - The metal is a conductor; but how can this be, except space be a conductor ? for it is the only continuous part of the metal, and the atoms not only do not touch (by the theory), but as we shall see presently, must be assumed to be a considerable way apart. Space therefore must be a conductor, or else the metals could not conduct, but would be in the situation of the black sealing wax referred to a little while ago.
Page 289 - A mind just entering on the subject may consider it difficult to think of the powers of matter independent of a separate something to be called the matter, but it is certainly far more difficult, and indeed impossible, to think of or imagine that matter independent of the powers. Now the powers we know and recognize in every phenomenon of the creation, the abstract matter in none; why then assume the existence of that of which we are ignorant, which we cannot conceive, and for which there is no philosophical...
Page 288 - ... all our perception and knowledge of the atom, and even our fancy, is limited to ideas of its powers : what thought remains on which to hang the imagination of an a independent of the acknowledged forces...
Page 286 - A piece of potassium contains less potassium than an equal piece of the potash formed by it and oxygen. We may cast into potassium oxygen atom for atom, and then again both oxygen and hydrogen in a twofold number of atoms, and yet, with all these additions, the matter shall become less and less, until it is not two-thirds of its original volume. If...
Page 291 - The view now stated of the constitution of matter would seem to involve necessarily the conclusion that matter fills all space, or, at least, all space to which gravitation extends...
Page 265 - At present I believe ordinary induction in all cases to be an action of contiguous particles, consisting in a species of polarity, instead of being an action of either particles or masses at sensible distances ; and if this be true, the distinction and establishment of such a truth must be of the greatest consequence to our further progress in the investigation of the nature of electric forces.
Page 161 - Magnets more and less powerful were used, some so strong as to bend the wire in its endeavors to pass round it. Hence it appears that however powerful the action of an electric current may be upon a magnet, the latter has no tendency by re-action to diminish or increase the intensity of the former; a fact which though of a negative kind, appears to me to be of some importance."!
Page 101 - ... takes place. So we can change chemical force into the electric current, or the current into chemical force. The beautiful experiments of Seebeck and Peltier show the convertibility of heat and electricity ; and others by Oersted and myself show the convertibility of electricity and magnetism. But in no case, not even in those of the Gymnotus and Torpedo, is there a pure creation or a production of power without a corresponding exhaustion of something to supply it.
Page 212 - I drew the conclusion, that the combinations and decompositions by electricity were referable to the law of electrical attractions and repulsions, and advanced the hypothesis, " that chemical and electrical attraction were produced by the same cause, acting in one case on particles, in the other on masses ;" and that the same property, under different modifications, was the cause of all the phenomena exhibited by different voltaic combinations.