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Updated: June 13, 2025
It was proved by Reich, Edmond Becquerel, and myself, that the condition of diamagnetic bodies, in virtue of which they were repelled by the poles of a magnet, was excited in them by those poles; that the strength of this condition rose and fell with, and was proportional to, the strength of the acting magnet.
Ten years ago the atoms of matter, of which it takes millions of millions to make a drop of water, were the minutest objects with which science could imagine itself to be concerned, Now a body of experimentalists, prominent among whom stand Professors J. J. Thompson, Becquerel, and Roentgen, have demonstrated the existence of objects so minute that they find their way among and between the atoms of matter as rain-drops do among the buildings of a city.
We lightered it, set up the tent, and as it was now but a short hour to sundown I bade them leave me and make their search. They went off together, and I busied myself with opening some of the paraphernalia I had brought with me. First of all I took out the two Becquerel ray-condensers that I had bought in Sydney.
Schermerhorn had achieved what the greatest minds before him had barely outlined. Yes, and more. Becquerel, the Curies, Rutherford they were playing with the letters of the Greek alphabet, Alphas, Gammas, and Rhos, while the simple, gentle old boy that I served had read the secret. From the molten eruptions of the racked earth he had taken gases and potencies that are nameless.
Sir J. J. Thomson, pursuing his research, found in 1896 that compounds of uranium sent out rays that could penetrate black paper and affect the photographic plate; though in this case the French physicist, Becquerel, made the discovery simultaneously' and was the first to publish it.
Experiments of Becquerel Work of the Curies Discovery of Radium Enormous Energy Various Uses.
It was at first thought that this apparatus, erected at numerous points over an extent of several miles, was of some service as a protection against hail, but this opinion was soon disputed, and does not appear to be supported by well-ascertained facts. See "On the Influence of the Forest in Preventing Hail-storms," a paper by Becquerel, in the Memoires de l'Academie des Sciences, vol. xxxv.
Isolated observations by Brugmanns, Becquerel, Le Baillif, Saigy, and Seebeck had indicated the existence of a repulsive force exercised by the magnet on two or three substances; but these observations, which were unknown to Faraday, had been permitted to remain without extension or examination. Having laid hold of the fact of repulsion, Faraday immediately expanded and multiplied it.
This experience at least was as up-to-date as the Curies, Becquerel, Ramsay, and the rest. "Transmutation," remarked Prescott, "was, as you know, finally declared to be a scientific absurdity in the eighteenth century. But I may say that it is no longer so regarded.
The phenomena of radioactivity were discovered accidentally in 1896 by the French chemist Becquerel. Many investigators immediately began working along this promising line, and two years later Madam Curie, in association with others, discovered the new element radium.
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