This important volume presents the symposia and panel discussions held at the VIII International Congress for Microbiology, Montreal, 1962. The topics reported on include: Structure and Function ("Membrane Permeation"; "Properties of Isolated Cellular Particles"); Agricultural Microbiology ("Insect Microbiology"; Psychrophilic Microorganisms"; "Enzymes in Soils"; "Effect of Chemical and Biological Control Measures on Soil Micro-organisms"); Industrial Microbiology ("Genetics Applied to Industrial Microbiology"; "Microbial Production of Amino Acids"; "Evolutionary Operation and Horizons in Industrial Microbiology"); Virology ("Mechanisms of Immunity in Infectious Diseases"; "Interference and Interferon"; "Demonstrations of Viruses in Neoplasia"); Medical and Veterinary Microbiology ("Pleuropneumonia-like Organisms as Agents of Human and Animal Diseases"; "The Virulence of Staphylococci"); general subjects ("Microbial Classification"; "Influence of the Environment on the Epidemiology of Mycoses"). The contributors are experts from nineteen countries and all continents except Africa. The volume provides an up-to-date account of international developments in microbiology.