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Updated: May 17, 2025
Chemists were here conspicuous Chevreuil, Talbot, Wedgewood, Daguerre, Cooke, Fresenius, Schmidt, Avogadro, Liebig, Davy, Berthollet, and many, many more. "It formed an equally striking scene. I turned to my companion and asked him how it was that the mathematicians, chemists, physicists, astronomers, were so crowded together.
Little suspecting that it was the very key to the inner mysteries of the atoms for which they were seeking, the chemists of the time cast it aside, and let it fade from the memory of their science. This, however, was not strange, for of course the law of Avogadro is based on the atomic theory, and in 1811 the atomic theory was itself still being weighed in the balance.
Four years later, the famous French physicist Ampere outlined a similar theory, and utilized the law in his mathematical calculations. And with that the law of Avogadro dropped out of sight for a full generation.
Without wanting in the respect I owed him, I would turn his terrible forebodings into jest, and continue my course of extravagance. However, I must mention here the first proof he gave me of his true wisdom. At the house of Madame Avogadro, a woman full of wit in spite of her sixty years, I had made the acquaintance of a young Polish nobleman called Zawoiski.
But there was no misadventure. I caused the somewhat dangerous result you witnessed, the wreckage not merely of the molecule of marsh gas you were examining which any educated chemist might do as easily as I but the wreckage of its constituent atoms. This is a scientific victory which dwarfs the work of Helmholtz, Avogadro, or Mendelejeff. "Atoms molecules! What are you talking about?"
Again, the laws of the effect of pressure and heat on gaseous bodies, the fact that they combine in definite proportions by volume, and that such proportion bears a simple relation to their combining weights, all harmonised with the Daltonian hypothesis, and led to the bold speculation known as the law of Avogadro that all gaseous bodies, under the same physical conditions, contain the same number of units.
Without wanting in the respect I owed him, I would turn his terrible forebodings into jest, and continue my course of extravagance. However, I must mention here the first proof he gave me of his true wisdom. At the house of Madame Avogadro, a woman full of wit in spite of her sixty years, I had made the acquaintance of a young Polish nobleman called Zawoiski.
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