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Updated: May 11, 2025
But Louise has only looked in for a moment to beg some cake for Lorentz and herself, and be off again on her ski to the hill-slopes. "Thank you, mother you're a darling!" And with a slice in each hand she dashes out, glowing with health and the cold air. If only Peer could glow with health again!
The ether of the general theory of relativity is transmuted conceptually into the ether of Lorentz if we substitute constants for the functions of space which describe the former, disregarding the causes which condition its state. Thus we may also say, I think, that the ether of the general theory of relativity is the outcome of the Lorentzian ether, through relativation.
Merle read it through hurriedly, and glanced at Lorentz once more. That evening, after the children had gone to bed, the father and mother sat up talking together in a low voice. And Merle had to admit that her husband was right. It would be selfish of them to keep the boy here, when he might be heir to Bruseth some day if they let him go.
I was in this state of anxiety when the peasant who was our guide burst into loud laughter, seconded by Lorentz. I asked them what they were about, but they did not know enough French to explain fully.
By the last decade of the century the theory was confidently advanced notably by Lorentz and Larmor though it was still without a positive basis. How the basis was found, in the last decade of the nineteenth century, may be told very briefly. Sir William Crookes had in 1874 applied himself to the task of creating something more nearly like a vacuum than the old air-pumps afforded.
But just then Louise came rushing in, breathless with news. "Mother father there are goats here!" And little Lorentz came toddling in after her: "Goats, mother," he cried, stumbling over the doorstep. The old house had stood empty and dead for years. Now it seemed to have wakened up again.
Lorentz supposes, besides, that all forces, whatever their origin, are affected by a translation in the same way as electromagnetic forces. M. Langevin and M. H. Poincaré have studied this same question and have noted with precision various delicate consequences of it.
But this conception of the ether to which we are led by Mach's way of thinking differs essentially from the ether as conceived by Newton, by Fresnel, and by Lorentz. Mach's ether not only conditions the behaviour of inert masses, but is also conditioned in its state by them. Mach's idea finds its full development in the ether of the general theory of relativity.
Thus the theory of Lorentz, as well as that of Maxwell, leads us to foresee that if an insulating mass be caused to move in a magnetic field normally to its lines of force, a displacement will be produced in this mass analogous to that of which Faraday and Maxwell admitted the existence in the dielectric of a charged condenser.
Pasadena Laboratory of the Mount Wilson Observatory. His method of procedure was similar to Faraday's, but his magnet and spectroscope were much more powerful, and a theory due to Lorentz, predicting the nature of the change to be expected, was available as a check on his results. When the current was applied the lines were seen to widen.
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