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Precision measurements of the refractive index of ethylene and neopentane over a pressure range 0 to 1 atm and a temperature range of 25 to 70 °C were made and used to calculate virial coefficients. Some measurements on air and n-hexane are also reported. Certain aspects of the use of the Rayleigh refractometer are discussed.
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Ashton et al. (1958) studied this question.
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