THE present small volume gives a very useful summary, clearly and concisely written, of the present position of our knowledge of the subject of which it treats. The author divides the peripheral nerves into somatic and autonomic, and the latter into sympathetic (thoracico-lumbar, to all regions of the body), enteric (plexuses of Auerbach and Meissner), and para-sympathetic, which is again divided into tectal (or ocular, supplying the sphincter of the iris and the ciliary muscle), bulbar (alimentary canal from nose and mouth to large intestine, with appendages, including the lungs), and sacral (lower part of large intestine, bladder, and external genitals). The several chapters deal with the divisions of the autonomic system and nomenclature; the general plan of origin arid of peripheral distribution; the nerve fibres of the autonomic system; the specific action of drugs on the sympathetic and parasympathetic systems; and the tissues innervated. Each chapter is followed by a bibliography of important papers and by a series of notes.
The Autonomic Nervous System.
By. Part I. Pp. viii + 80. (Cambridge: W. Heffer and Sons, Ltd., 1921.) 5s. net.