In contrast to the so-called animal, cerebrospinal, voluntary nervous system, an involuntary, sympathetic, anatonomous or vegetative system is universally recognized. It consists of a large amount of ganglions and nerves which are instrumental in the innervation of internal organs (abdomen, chest), secretory and endocrine glands, smooth musculature, genito-urinary organs, blood vessels—in short, whenever and wherever the will is not consulted. As the sympathetic nerve function is concerned with organs that are necessary to the maintenance of life, Müller prefers the name "vital nervous system." As the field of activity of the sympathetic nervous system is extensive, covering an enormous amount and great variety of organs, it is not surprising that it required a large volume to give a proper presentation of the various topics. Anatomy, physiology, pharmacology and pathology are discussed in detail, supported by a large number of excellent illustrations. Interesting chapters deal with the rôle of the sympathetic