Biolumninescence and chemiluminescence, new perspectives. Edited by J. Scholmerich, A. Andreesen, A. Kapp, M. Ernst and W. G. Woods. (Proceedings of IV International Biolunminescence Symposium, Freiburg, September, 1986). Wiley, Chichester, 616 pages. Price £60 and $125 (1987) ISBN 0‐471‐091470‐3