Scientia Sinica

48 SCIENTIA SINICA Vol, V P—Ppo=ks for this case. However, as o—0 equation (52), in general, tends to ds P— Po = Ros + WZ fe (53)

ds = Ros + (SE Le +a where now ,

ea (Re — ha) 1) = PG Ee 72

is the coefficient of volume viscosity originally defined by Frenkel. It is seen that this definition makes volume viscosity also express the elastic part of

the variation. This seems to be quite undesirable.

REFERENCES

[1] Lu, Hoff, 1950. Chinese Jour. Phys.,7, 365

[2] Lu, Hoff, 1951. Jour. Acous, Soc. Amer., 23, 12.

[3] Lu, Hoff, 1951. Chinese Jour. Phys., 8, 5.

[4] Lu, Hoff, 1951. Chinese Jour. Phys.,8 , 145.

[5] Herzfeld, K. F., & Rice, F. O., 1929. Phys. Rev., 31, 691.

[6] Bourgin, D. G., 1936. Phys. Rev.,50, 355.

{7] Kneser, H. O., 1931. Ann. d. Physik, 11, 761.

[8] Frenkel, J., 1946. Kinetic Theory of Liquids, Oxford, 208.

{9] Hall, L., 1948. Phys. Rev., 73, 775.

[10] Einstein, A., 1920. Sitz. Berl. Akad., 380.

[11] Luck, D. G. C., 1932. Phys. Rev., 40, 440.

[12] Liebermann, L., 1949. Phys. Rev., 76, 1520.

[13] Liebermann, L., 1948. Jour, Acoust. Soc. Amer., 20, 868.

[14] Markham, Beyer Lindsay, 1951. Rev. Mod. Phys., 23, 353.

[15] See, e.g., Richards, W. T., 1939. Rev. Mod. Phys., 11, 40.

Fricke, E. F., 1940. Jour. Acoust. Soc. Amer., 12, 245.

[17] Fowler, R. H., 1936. Statistical Mechanics, 2nd ed., Oxford, Ch, III. [18] Knudsen, V. O., and Fricke, E., 1940. Jour. Acoust. Amer., 12, 255. [19] Stewart, E. S., 1946. Phys. Rev., 69, 632.

{20] Zartman, I. F., 1949. Jour, Acoust, Soc. Amér., 21, 171.

[21] Slater, J. C., 1939. Introduction to Chemical Physics, McGraw-Hill, Ch. IX. [22] O’Connor, C. L., 1954. Jour. Acoust, Soc. Amer., 26, 361.

[23] Railston, W., 1939. Jour, Acoust, Soc. Amer., 11, 107.

[24] Litovitz, Lyon, and Peselnick, 1954. Jour. Acoust. Soc. Amer, 26, 566.