Microbial behaviour “in vivo” and “in vitro”. Fourteenth Symposium of the Society for General Microbiology, held at the Royal Institution, London, April 1964: Edited by H. Smith, Microbiological Research Establishment, Porton, Salisbury, Wiltshire; and Joan Taylor, Central Public Health Laboratory, Colindale, N.W.9. New York: Cambridge Univ. Press, London and New York (1964). x + 296 pp. $8.00