Faraday as a DiscovererLongmans, Green, and Company, 1870 - 208 pàgines |
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atom atomic theory attraction axis Bakerian Lecture battery beam bismuth caused cells character chemical chloride circuit conductor contact theory crystal Davy decomposed diamagnetic bodies direction discovery disk distance earth effect electric current Electro-chemical Decomposition electro-magnet electrode endeavoured ether excited experimental experiments fact Faraday's galvanometer gases gravity heat heavy glass honour idea induced currents insulator intellect investigation iron JOHN TYNDALL lecture letter Leyden jar lines of force lines of magnetic liquid Lord Melbourne luminiferous ether magne-crystallic action magnetic field magnetic force magnetic needle magnetization of light Magneto-electric matter memoir ments metals Michael Faraday mind molecular molecules motion natural netic observed optical oxygen paper particles passed phenomena philosopher Plücker polarized poles position produced proved regarding repulsion researches rotation round Royal Institution Royal Society scientific space sphere substance theoretic thought tion tricity tube turmeric Tyndall vibrations voltaic pile wire
Passatges populars
Pàgina 82 - That gravity should be innate, inherent, and essential to matter, so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another, is to me so great an absurdity, that I believe no man, who has in philosophical matters a competent faculty of thinking, can ever fall into it.
Pàgina 60 - Memoir of 1806, the points established are of the utmost value, "the mode of action by which the effects take place is stated very generally; so generally, indeed, that probably a dozen precise schemes of electro-chemical action might be drawn up, differing essentially from each other, yet all agreeing with the statement there given.
Pàgina 99 - I have long held an opinion, almost amounting to conviction, in common I believe with many other lovers of natural knowledge, that the various forms under which the forces of matter are made manifest have one common origin; or, in other words, are so directly related and mutually dependent, that they are convertible, as it were, one into another, and possess equivalents of power in their action.
Pàgina 147 - I have not yet found a mind that did habitually separate it from its accompanying temptations; and there can be no doubt that the words definite proportions, equivalents, primes, &c., which did and do express fully all the facts of what is usually called the atomic theory in chemistry, were dismissed because they were not expressive enough, and did not say all that was in the mind of him who used the word atom in their stead ; they did not express the hypothesis as well as the fact.
Pàgina 158 - I am more inclined to the notion that in the transmission of the force there is such an action, external to the magnet, than that the effects are merely attraction and repulsion at a distance. Such an action may be a function of the ether ; for it is not at all unlikely that, if there be an ether, it should have other uses than simply the conveyance of radiations (2591.
Pàgina 89 - In the researches now under review the ratio of speculation and reasoning to experiment is far higher than in any of Faraday's previous works. Amid much that is entangled and dark we have flashes of wondrous insight and utterances which seem less the product of reasoning than of revelation.
Pàgina 153 - His theoretic notions -werefltient ; and when minds less plastic than his own attempted to render those fluxional images rigid, he rebelled. He warns Phillips, moreover, that from first to last " he merely threw out as matter for speculation the vague impressions of his mind ; for he gave nothing as the result of sufficient consideration, or as the settled conviction, or even probable conclusion at which he had arrived.
Pàgina 150 - It would seem, therefore, that in accepting the ordinary atomic theory, space may be proved to be a non-conductor in non-conducting bodies, and a conductor in conducting bodies, but the reasoning ends in this, a subversion of that theory altogether; for if space be an insulator it cannot exist in conducting bodies, and if it be a conductor it cannot exist in insulating bodies. Any ground of reasoning which tends to such conclusions as these, must, in itself, be false.
Pàgina 95 - ... too strong to stand against. The sun shone brightly, and the rainbows seen from various points were very beautiful. One at the bottom of a fine but furious fall was very pleasant. There it remained motionless, whilst the gusts and clouds of spray swept furiously across its place, and were dashed against the rock. It looked like a spirit strong in faith and steadfast in the...
Pàgina 66 - ... analogies, we ascribe electrical phenomena to the action of a peculiar fluid, sometimes flowing, sometimes at rest. Such conceptions have their advantages and their disadvantages; they afford peaceful lodging to the intellect for a time, but they also circumscribe it, and by and by, when the mind has grown too large for its lodging, it often finds difficulty in breaking down the walls of what has become its prison instead of its home...