Chapter 1.-Some aspects of the air pollution problem--a panel discussion Chapter 2.-Diffusion of stack gases in very stable atmospheres Chapter 3.-The statistical theory of diffusion by turbulent eddies Chapter 4.-Instruments for air pollution measurement Chapter 5.-Microclimate factors in smoke pollution from small stacks Chapter 6.-Ground-level measurements of oil-fog emitted from a hundred-meter chimney Chapter 7.-Gustinss profiles in the lower layers of the atmosphere Chapter 8.-Air-tunnel studies of diffusion in urban areas Chapter 9.-Analysing winds for frequency and duration Chapter 10.-The forecasting of micrometeorological variables