Abstract
IT is interesting to note that the measurements (by weighing) of water vapour on metal surfaces reported by Dr. F. P. Bowden and W. R. Throssell1 are in agreement with measurements (by insulation resistance determination) published twenty-one years ago2 for the adsorption of water vapour on clean and contaminated mica surfaces. The accompanying graph has been plotted from these measurements by assuming a sodium chloride ‘contamination’ which would give a measurable insulation resistance for a thickness of electrolyte of the order of molecular dimensions (10−8 cm.)—a concentration of as low as 10−6 gram-equivalent per c.c. suffices.
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References
Bowden, F. P., and Throssell, W. R., Nature, 167, 601 (1951).
Macaulay, J. M., and Carson, D., J. Roy. Tech. Coll., Glasgow, 2, 161 (1930).
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MACAULAY, J. Adsorption of Water Vapour on Solid Surfaces. Nature 167, 1038 (1951). https://doi.org/10.1038/1671038a0
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DOI: https://doi.org/10.1038/1671038a0
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