280 LIU AND WHITBY 3. H. J. White, Particle Charging in Electrostatic Precipitation, Trans. Am. Inst. Elec. Engrs., 70: 1186-1191 (1951). 4, R. Cochet, Lois de charge des Fines Particules (submicronique) Etudes Theoretiques—Controles Recents Spectre de Particles, in Colloque Inter- nationat=—La Physique des Forces Electrostatiques et Leurs Applications, pp. 331-338, Centre National de la Recherche Scientifique, Paris, 1961. . V. G. Drozin and V. K. La Mer, The Determination of the Particle Size Dis- tribution of Aerosols by Precipitation of Charged Particles, J. Colloid Sci., 14: 74-90 (1959), G. Langer, Electrostatic Classification of Submicron Airborne Particles, Report No. 3187-5 to AEC, Armour Research Foundation, August 1961. . H. J. White, Industrial Electrostatic Precipitation, Addison-Wesley Publishing Co., Inc., Reading, Mass., 1962. . A. T. Murphy, F. T. Adler, and G. W. Penney, A Theoretical Analysis of the Effects of an Electric Field on the Charging of Fine Particles, Trans. Am. Inst. Elec. Engrs., 78: 318-325 (1959). . K. T. Whitby, D. A. Lundgren, and C. M, Peterson, Generation and Measurement of Homogeneous Fluorescent Aerosols, Preprint 27, presented at the Symposium on Particulates and Air Ions, 55th Annual Meeting of American Institute of Chemical Engineers, Chicago, Ill., Dec. 2—6, 1962. 10, K. T. Whitby, Generator for Producing High Concentrations of Small Ions, Rev. Sci. Instr., 32(12): 1351-1355 (1961). 11, K. T. Whitby and C. M. Peterson, The Electrical Neutralization and Particle Size Measurement of Dye Aerosols, presented at the American Chemical Society Meeting, Atlantic City, N. J., Sept. 13, 1962. 12, L. B. Loeb, Basic Processes of Gaseous Electrons, University of California Press, Berkeley, Calif., 1961. 13. N, A, Fuks, The Mechanics of Aerosols (English translation by E. Lacho- wicz, U.S. Army Chemical Warfare Laboratories, Spec. Publ. 4-12, Army Chemical Center, Md., 1958). 14, B. Y. H. Liu and K. T. Whitby, The Electrical Charging of Small Particles at Low Pressures, First Progress Report to AEC, Contract AT(11-1)-1248, University of Minnesota, October 1961. 15. E.H. Kennard, Kinetic Theory of Gases, McGraw-Hill Book Company, Inc., New York, 1938.

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