Abstract
PROF. JEAN PERRIN (of the University of Paris) in his recent course of lectures at King's College, London, dealt with aggregates of suspended particles regarded as fluids consisting of visible microscopic molecules. The Brownian movement of such particles appears to be due to molecular agitation, suggesting that particles in suspension function as enormous molecules. If this is so, the laws of gases extended by Van't Hoff to solutions apply also to dilute emulsions consisting of uniform grains, and from a knowledge of the osmotic pressure of this “gas of visible molecules,” one can calculate, using Avogadro's law, the ratio of the masses of the grains to those of the molecule of any gas, an indefinite vertical column of emulsion in equilibrium having the properties of a miniature atmosphere.
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Fluids with Visible Molecules . Nature 93, 332 (1914). https://doi.org/10.1038/093332a0
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DOI: https://doi.org/10.1038/093332a0