This volume has been entirely rearranged, revised and in some instances partially rewritten. The scope of the book is broad. It contains ten sections, which have been prepared by different authors or co-authors, except three, these being written by the same writer. The sections are on glucosides, nonglucosidalbitter principles, enzymes, putrefaction bases, animal bases, animal acids, the cyanogen compounds, the proteins, and the digestion products of the proteins. An excellent bibliography is given at the end of each section. The authors are to be commended, as the material is well chosen, maintaining the high character of the previous editions. The book should prove useful as a work of reference to the chemist in general and helpful to those working in the realm of laboratory medicine.