A first lieutenant of artillery, 35, was able to count 38 artillery clashes in which he had taken part in two months of very strenuous, almost daily fighting. Then appeared headaches, anxiety, dizzy feelings, insomnia. Finally one day suddenly, after eating, the lieutenant sustained a loss of consciousness with convulsions, which sent him to his home reserve hospital. The officer had felt nothing before his convulsions came on. The medical report, however, yields no doubt of the epileptic character of the attack. When he was examined, there was a slight psychopathic depression with a feeling of insufficiency, anxiety, insomnia, restless dreams, over-sensitiveness, and a pessimistic outlook on the future. There were no epileptic traits whatever. There was nothing alcoholic, luetic, or arteriosclerotic about the officer. There was nothing in the childhood or youth of the patient, though there had been a fall two years before, with phenomena of concussion without sequelae. In fact, this fall with concussion had led to no medical examination. As to the relation of the concussion two years before to the epileptic attack, Bonhoeffer is inclined to interpret the case as one of genuine “reactive” epilepsy on the basis of continuous overstrenuous work for a period of weeks. He regards the previous concussion as soil for this epilepsy. _Re_ amount of stress occasionally required to bring out epilepsy, compare Hurst’s Cases 64 and 80. It may be recalled that Bonhoeffer is decidedly of the belief that exhaustion has not brought about any actual psychoses, calling attention to the remarkable absence of psychoses among the Serbians after their exhausting campaigns. A general review of war experience indicates, according to Bonhoeffer, the marked power of resistance of the healthy brain. Nocturnal narcoleptic seizures accompanied by spells of somnolence in the day, both to be regarded as due to the “brain fag” of trench life. =Case 77.= (FRIEDMANN, July, 1915.) A tradesman, 23, had been in the German infantry since the beginning of the war. Never sick, he had been, in a general way, nervous; and a brother had had, at the age of 30 years, some sort of severe brain disease, in which he became blind, dying a year later. The man was for a long time in the trenches and proved himself a courageous and stalwart soldier. He went to hospital after a slight bullet wound of the leg, with a benign paralysis of the peroneus. In the hospital he began to show a somewhat pronounced emotional depression, with a nervous tachycardia.