This volume includes a number of highly technical essays on the chemistry of the enzymes under the following chapter headings: Physical Chemistry of the Enzymes; Esterases; Proteolytic Enzymes and Peptidases, Mammal Gastric Proteases, Tryptases, Peptidases; Amidases; Carbohydrases, Sucrase (Saccharase, Invertase), Glucosidases, Maltases, Galactosidases, Lactase, Melibiase, "Emulsion," Polyases, Lichenase, Cellulase, Inulase; Catalase; Oxidizing Enzymes, Dehydrogenases or Anaerobic Oxidases, Oxidases or Aerobic Oxidases; The Flavine Oxidation System of Warburg and Christian and Its Relation to Other Dyes; Carbonic Anhydrase; The Zymase Complex and Alcoholic Fermentation; Luciferase. For all those interested in research in this field, it may be of special value; for the general reader, it is, of course, a book of reference.