To insure a wide dissemination of information describing advances in measurement and control techniques, the Instrument Society of America (ISA) has published this monograph of selected papers from recent ISA symposia dealing with air pollution. Papers range from a discussion of some relatively new applications of proven techniques to discussions of stack monitoring, calibration sources, and meteorological effects. Titles include: The Key Role of Instrumentation in Pollution Control, Pollution Control--A Corporate Dilemma, Where Air Pollution Control Stands as an Industry, Current Trends in Continuous Air Pollution Monitoring Systems, Ambient Air Programs--An Inaccurate Measurement, Air Pollution Testing in the Metals Industry, Air Conservation Van, Measurement of Air Pollutant Penetration into Building Interiors, Automated Gas Chromatographic Analysis of Sulfur Pollutants, A Gas Chromatographic Method for Automatic Monitoring of Pollutants in Ambient Air, Multi-Parameter Air Quality Analyzer, Hydrocarbon Analysis in Auto Exhaust by Various Instrumental Methods, A Stable Ozone Source Applicable as a Secondary Standard for Calibration of Atmospheric Monitors, A Calibration System for Trace Analysis, Monitoring Stationary Source Emissions for Air Pollutants with Photometric Analyzer Systems, and Analysis of Selected Elements in Atmospheric Particulate Matter by Atomic Absorption. (BL)