The first part of this book offered a dissertation on morphine which provided an excellent informative source for reference. The second part is intended to supplement the other volume and offers concise presentation of pertinent data on codeine, ethylmorphine, dihydromorphinone, diacetylmorphine, thebaine, apomorphine, other derivatives of morphine, sinomenine and its derivatives, papaverine and its derivatives, narcotine and its derivatives, narceine and its derivatives, cryptopine and protopine. The book is not for the practicing physician unless he has an unusual interest in the opium alkaloids; it should be available for all teachers and researchists in pharmacology and therapeutics. The material is presented in concise form and its accumulation must represent the labor of almost uncountable searches into the literature by the authors. The bibliography, subject and author indexes are as complete as the reviewer has ever seen.