Heterogeneous removal of free radicals by aerosols in the urban troposphere / L.A. Farrow, T.E. Graedel, and T.A. Weber -- Precipitation scavenging of organic contaminants / R.N. Lee and J.M. Hales -- Introduction, transport, and fate of persistent pesticides in the atmosphere / D.E. Glotfelty and J.H. Caro -- Standards development in the control of hazardous contaminants in the occupational environment / Douglas L. Smith and Jack E. McCracken -- Electrically augmented filtration of aerosols / G.H. Fielding, H.F. Bogardus, R.C. Clark, and J.K. Thompson -- Experimental and theoretical aspects of cigarette smoke filtration / Charles H. Keith -- Aerosol filtration by fibrous filter mats / William S. Magee, Jr., Leonard A. Jonas, and Wendell L. Anderson -- Removal of sulfur dioxide in stack gases / Donald A. Erdman -- Kinetics of trace gas adsorption from contaminated air / Leonard A. Jonas, Joseph A. Rehrmann, and Jacqueline M. Eskow -- The reaction between ozone and hydrogen sulfide : kinetics and effect of added gases / Sotirios Glavas and Sidney Toby -- Photolysis of alkyl nitrites and benzyl nitrite at low concentrations : an infrared study / Bruce W. Gay, Jr., Richard C. Noonan, Philip L. Hanst, and Joseph J. Bufalini -- Fates and levels of ambient halocarbons / Daniel Lillian, Hanwant Bir Singh, Alan Appleby, Leon Lobban, Robert Arnts, Ralph Gumpert, Robert Hague, John Toomey, John Kazazis, Mark Antell, David Hansen, and Barry Scott -- The fate of nitrogen oxides in urban atmospheres / Chester W. Spicer, James L. Gemma, Darrell W. Joseph, and Arthur Levy -- High ozone concentrations in nonurban atmospheres / Lyman A. Ripperton, Joseph E. Sickles, W. Cary Eaton, Clifford E. Decker, and Walter D. Bach -- Gas-phase reactions of ozone and olefin in the presence of sulfur dioxide / D.N. McNelis, L. Ripperton, W.E. Wilson, P.L. Hanst, and B.W. Gay, Jr.