The study of bioluminescence--visible light emitted by living organisms--is truly in progress, as these 35 papers contributed by 49 of the leading scientists active in this field attest. Not since E. Newton Harvey's Bioluminescence in 1952 has there appeared a more comprehensive and critical study. The approaches to the subject range from the purely chemical and physical to the purely biological. There are magnificent electron micrographs and some color plates. Originally published in 1966. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905.