chosen to give correctly the known total particle concentration.
(12) Whitby, K. T.; Clark, W. E. Tellus 1966,18, 573. (13) Hoppel, W. A. J . Aerosol Sci. 1978,9, 41. (14) Liu, B. Y. H.; Lee, K. W. Environ. Sci. Technol. 1976, 10, 34.5.
Literature Cited (1) Junge, C.; Jaenicke, R. J . Aerosol Sci. 1971,2, 305. (2) Whitby, K. T.; Husar, R. B.; Liu, B. Y. H. J. Colloid Interface Sci. 1972,39, 1777. (3) Pollak, L. W.; Metnieks, A. L. Geofis. Pura Appl. 1957,7, 183. (4) Fuchs, N. A.; Stechkina, I. B.; Starosselskii, V. I. Br. J. Appl. Phys. 1962,13, 280. (5) Twomey, S.; Severynse, G. T. J. Atmos. Sci. 1964,21, 558. (6) Fuchs, N. A.; Sutugin, A. G. “Highly Dispersed Aerosol”; Ann Arbor Science Publishers: Ann Arbor, MI, 1970; p 37. (7) Spurny, K. R.; Lodge, J. P.; Frank, E. R.; Sheesley, D. C. Enuiron. Sci. Technol. 1969,3, 453. (8) Spurny, K. R.; Lodge, J. P. National Center for Atmospheric Research Report NCAR-TN/STR077, Vols. 1-111, 1972. (9) Twomey, S. J . Cornput. Phys. 1975,18, 188. (10) Crank, J. “The Mathematics of Diffusion”, 2nd ed.; Oxford University Press: London, 1956; p 84. (11) Melo, T.; Phillips, C. R. Environ. Sci. Tethnol. 1974,8, 67.
(15
