The series of papers presented at the Industrial Hygiene Foundation's recent conference on industrial wastes is now available under one cover in this bulletin. It deals very largely with air pollution from the technical, managerial, legal, public relations, meteorologic and socioeconomic point of view. The medical contributor was concerned over the paucity of dependable observations on the relation of air contaminants to health and, until such data were available, felt that care should be taken to avoid needless alarm. Several papers discussed stream pollution, which has much in common with smog, in that ultimate correction must depend on an aroused public opinion. The authorities making up the conference agreed that present knowledge can be mobilized to modify or abolish pollution from industrial sources but that much additional scientific study, epidemiologic observation and public education are needed before a final solution appears.