Abstract
IN reference to the editorial comment in NATURE of Mar. 29, may I say that my letter of Feb. 3 on the subject was communicated at the same time to the Journal of Rheology and appeared in its January issue in this country. As you have stated, I was unaware that Prof. Andrade was working on the subject. His formula η = Aek/T, where η = viscosity, is obviously identical with the one which I proposed, where Φ = 1/η, the fluidity. As pointed out in my note of Feb. 15, also published in NATURE of Mar. 30, both of us were actually anticipated by Señor de Guzman and Prof. C. Drucker. It is curious that such a considerable lapse occurred in the recognition of what certainly appears to be the most satisfactory formula relating viscosity or fluidity of liquids to temperature. I was led to it myself by the work of Stewart, Katz, Prins, and others on the X-ray diagrams of liquids. The existence of ‘partial regional orientation’ of the molecules in liquids suggests a partition into non-oriented and oriented species, the latter being regarded as slightly deformed. Applying the Maxwell-Bolzmann equation, in the form
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SHEPPARD, S. Relation of Fluidity of Liquids to Temperature. Nature 125, 709 (1930). https://doi.org/10.1038/125709b0
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DOI: https://doi.org/10.1038/125709b0
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