_Re_ complicated pictures of organic and functional nature, some experimental work has been carried out. Mairet and Durante set off explosives, such as melinite, at a distance of 1 to 1.5 metres, near rabbits. Some died at intervals from an hour to thirteen days; others lived. Pulmonary apoplexy was found in the cases dying early. Spinal cord and root hemorrhages, hemorrhages in the cortical and bulbar gray, perivascular and ependymal hemorrhages were found, always small and without diffusion, suggesting rupture by rapid decompression following the first wave of aerial compression. The functional effects are thought to be brought about through the anemia of the areas supplied by the ruptured vessels. Russca of Berne got similar results and notes direct and contrecoup brain lesions, tympanic perforations, intra- and extra-ocular hemorrhages, thoracic, cardiac, and splenic hemorrhages, ruptures of kidney, stomach, intestine, and diaphragm. As in the work of Mairet and Durante, the lung proved the most sensitive organ. (Compare also the human case of Sencert [Case 201].) Some experiments with fishes yielded lesions of the swimming bladder. Persalite and other explosives were used. GASSING: Organic-looking picture. =Case 215.= (NEIDING, May, 1917.) A German soldier, 21, was a serious case of gassing. He was unconscious two days (venesection twice). When he came to, he could not walk and felt as if he were drunk. October 22, 1916, he was incoördinate in walking and tended to fall forward when standing with eyes closed. The ataxia of the legs was demonstrable in the position of dorsal decubitus, and there was also a slight ataxia of the arms. The pupils were dilated and reacted poorly to light. December 12, all symptoms had disappeared. The clinical picture in this case was somewhat like that of a multiple sclerosis. According to Neiding, the disorder is not a functional one but an organic cerebellar disorder.