_Re_ the neurology of gas poisoning, Neiding regards the condition as a new nosological unit. We do not know what the ultimate results of apparently cured cases will be. Court questions of importance will doubtless arise with reference to their compensation. Ninety-six of Neiding’s 274 cases failed to show any nerve symptoms whatever; forty-six cases showed one symptom only, such as headache, dizziness, abnormality of reflexes, or abnormality in sensation. One hundred and thirty-two cases presented a fairly full picture. The picture of a complete traumatic neurosis not infrequently appears, aided perhaps by the psychic features of the gas attacks; and possibly some cases are entirely psychogenic from the beginning. Such symptoms, for example, as dermatographia, rapid and irregular heart, hyperidrosis, blepharospasm, mental perturbation, hypochondria, etc., do not necessarily point to any directly toxic effect of the gases. Thirty-seven of Neiding’s cases showed pupillary changes, hyperreflexia, and analgesia. Thirty-one showed analgesia and absence of laryngeal and corneal reflexes. Twenty-six showed pupillary changes and hyperreflexia, four of these latter showing also an absence of laryngeal and corneal reflexes. One case yielded hyperalgesia alone; ten yielded headache, dizziness, and analgesia. GASSING: Mutism, tremors, depression, battle dreams. =Case 216.= (WILTSHIRE, June, 1916.) An infantryman, aged 27, had been at the front for three months. He was wounded a month before coming to hospital; but when the wound healed he went back to the front, quite mute but intelligent and able to write the following: “We were on our way to the trenches, and as we were going through the railway cutting they started to shell us, with gas shells mostly, and we had not been there more than quarter of an hour when I was compelled to lie down from temporary blindness and weakness through getting a dose of gas through my mouth and eyes. I was lying down for about ten minutes when a shell came somewhere near, and was struck by something in the face and on my left knee and I remembered no more until I found myself in hospital. I was all of a shake and while lying down would frequently jump up and wonder where I was.” The patient had been mute thereafter, depressed, and given to dreams about fighting and shells. There was a fine tremor controllable by the will; the knee-jerks were increased. On lateral deviation, there was difficulty in fixing the eyes. There was a slight deafness due to an old discharging left ear. According to Wiltshire, Shell-shock is only exceptionally caused by chemical poisoning from gas.