This is the eighth collection of papers prepared under the guidance of the Committee on Air Pollution of the USSR Public Health Inspectorate. The collection contains papers approved by the Committee in 1962--1963. The first paper is devoted to the determination of norms for atmospheric pollutants. Some of the articles present new experimental material for the determination of maximum permissible atmospheric air concentrations of waste products discharged into the air by new industries producing synthetic materials. One article on new synthetic material deals with chromium toxicity and its significance as an atmospheric pollutant. New substances obtained in the course of investigating chloroprene are described. Some articles are devoted to the combined action of atmospheric pollutants. The volume contains two articles discussing methods for the determination of atmospheric pollutants and by outlining statistical methods for processing experimental data. The appendix contains a revised and expanded list of maximum permissible concentrations and provisional method for computing dipersion of industrial wastes, such as ashes and sulfur dioxide, discharged into the atmosphere through their smoke stacks by electirc power, heat and light stations.