As the title indicates, this book treats of only the organic nervous diseases. So-called functional diseases, such as epilepsy, hysteria, paralysis agitans, etc., are not considered, nor are trophic disturbances, as acromegaly, and Raynaud's disease. The opening chapter is a discussion of the structure of the nervous system based on the neuron hypothesis. One hundred and thirty-four pages are devoted to the peripheral nerves, and about one-half of these to the various forms of multiple neuritis, which are discussed in a thorough manner and illustrated by a number of the author's cases. Diseases of the spinal cord are given 236 pages. The chapter on the diagnosis and localization of spinal cord diseases demonstrates clearly how careful observation of signs and symptoms will enable a physician, equipped with a knowledge of the anatomy and physiology of the cord, to make an accurate diagnosis by a more logical process than in any