One of the reported cases in which lung splitting occurred from severe concussion without external injury is not without interest in this connection, reminding one, as the commentator says, of those cases of severe concussion in which the interior of a building is injured while the exterior escapes. In the same connection also the cited experiments of Mairet and Durante on rabbits are not without instructiveness. As a result of explosives set off close to these animals, pulmonary apoplexy, spinal cord and root hemorrhages, and extravasations, perivascular and ependymal, and into the cortical and bulbar gray were found. Russca obtained direct and _contrecoup_ brain lesions, etc., in a similar way. Here and there throughout the book will be found references to symptoms and syndromes which will have a particular interest for the reader--soldier’s heart, trench foot, congealed hand, tics, tremors, convulsions, sensory areas variously mapped, and forms of local tetanus, the last being distinctly to be differentiated from pithiatic contractures and those due to organic lesions of the nervous system. Cases of an affection described by Souques as camptocormia, from Greek words meaning to bend the trunk, were shown to the Neurological Society of Paris in 1914 and later, the main features of this affection being pronounced incurvation forward of the trunk from the dorsolumbar region, with extreme abduction and outward rotation of the lower limbs, pain in the back, and difficult and tremulous walking. In some of these cases, organic lesions of the trunkal tissues were present, but in addition psychic elements played a not unimportant part, and the cases were restored to health by a combination of physical measures with psychotherapy, enforced by electrical applications. The part of this book given over to the discussion of treatment will doubtless to some prove the most interesting section. The presentation of the subject of therapeutics is in some degree a discussion also of diagnosis and prognosis; and so it happens in various parts of the volume that the particular subject under consideration is more or less a reaffirmation or anticipation of remarks under other headings. Similar results are brought about by various therapeutic procedures. Nonne, Myers, and a few others bring hypnosis into the foreground, although non-hypnotic suggestion plays a larger rôle by far.