Abstract
WITHIN the past year discussions have been published1,2 which have been critical of the present system of vacuum designation and have advocated logarithmic scales. We have been independently3 considering this same problem and have arrived at a more specific proposal than that found in refs. 1–3, which encompasses the whole range of pressures from that of the ‘highest’ vacuum (that is, lowest molecular density) we can attain to the greatest pressures we choose to discuss. It will not ascribe negative values to pressures greater than atmospheric2.
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References
Worrell, F. T., Nature, 199, 476 (1963).
Cuthbert, J., Nature, 201, 61 (1964).
Baldwin, G. C., and Tonks, L., General Electric Co. Internal Rep., 64GL3 (Jan. 3, 1964); Bull. Amer. Phys. Soc., 9, 476 (1964).
Smithsonian Physical Tables, ninth edit.
Bundy, F. P. (private communication).
Allen, C. W., Astrophysical Quantities, 109 (Univ. London Press, 1955).
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BALDWIN, G., TONKS, L. Logarithmic Pressure Scale. Nature 203, 633–634 (1964). https://doi.org/10.1038/203633a0
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DOI: https://doi.org/10.1038/203633a0
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