The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science

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Taylor & Francis, 1900 - Science

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Page 47 - Microseismic shock : recorded by a single seismograph or by seismographs of the same model, but not by several seismographs of different kinds; the shock felt by an experienced observer.
Page 188 - II., we see that the minimum density is about '35, and at distance approximately "87 from the centre. 9. Let us suppose now our atom to be set in motion through space occupied by ether, and kept in motion with a uniform velocity v, which we shall first suppose to be infinitely small in comparison with the propagational velocity of equivoluminal* waves through pure ether undisturbed by any other substance than that of the atom. The velocity of the earth in its orbit round the sun being about 1/10,000...
Page 197 - It is remarkable that according to the particular assumptions specified in 5, a density of ether in the centre of the atom considerably greater than 100 times the density of undisturbed ether is required to make the refractivity as great as that of oxygen. There is, however, no difficulty in admitting so great a condensation of ether by the atom, if we are to regard our present problem as the basis of a physical hypothesis worthy of consideration. 18. There is, however, one serious, perhaps...
Page 48 - General awakening of those asleep; general ringing of bells, oscillation of chandeliers, stopping of clocks; visible disturbance of trees and shrubs.
Page 48 - Fourth, the intensity of the shock, expressed either in common language or in terms of some arbitrary scale. Professor Rockwood, in indicating the intensity, has used the adjectives: 1, very light; 2, light; 3, moderate; 4, strong; 5, severe; 6, destructive; but has added a Roman numeral to indicate the intensity, according to the Rossi-Forel scale, adopted by Swiss and Italian seismologists. In Professor Rockwood's papers, very light is II or III; light, IV; moderate, V or VI; strong, VI or VII;...
Page 50 - Rather strong, felt generally indoors, but by few outside, with waking of those asleep, with alarm of some persons, rattling of doors, ringing of bells, rather large oscillation of suspended objects, stopping of clocks.
Page 306 - ... within them, would cause apparent attraction between a positive and a negative electron ; and apparent repulsion between two electrons both positive or both negative. 22. But these apparent attractions and repulsions would increase much more with diminished distance than according to the Newtonian law of the inverse square. This law, which we know from Coulomb and Cavendish to be true for electric attractions and repulsions, cannot be explained t>y stress in ether according to any known or...
Page 181 - electro-magnetic theory of light " does not cut away this foundation from the old undulatory theory of light. It adds to that primary theory an enormous province of transcendent interest and importance ; it demands of us not merely an explanation of all the phenomena of light and radiant heat by transverse vibrations of an elastic solid called ether, but also the inclusion of electric currents, of the permanent magnetism of steel and lodestone, of magnetic force, and of electrostatic force, in a...

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