Osmotic Pressure

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IN last week's NATURE, Lord Rayleigh gave, for an involatile liquid, a rigorous and clear proof of “the Central Theorem” of osmotics. But this theorem, though highly interesting in itself, is not, so far as I can see, useful as a guide for experiment. Consider for example the typical cases of sugar, and of common salt, dissolved in water.

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KELVIN Osmotic Pressure. Nature 55, 272 (1897) doi:10.1038/055272a0

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