The Neurological Society of Paris held a conference December 15, 1916, with the chiefs of the neurological and psychiatric military centres of France, and discussed a variety of questions concerning invaliding, incapacity, and compensation in neuroses and psychoses of war. Dupré dealt especially with the psychoses of war as caused by trauma, strain, infection, and intoxication. General paresis is regarded by Dupré as the most important of the dementias found in the army. The medicolegal point of view is, of course, that general paresis is necessarily related to an old syphilis, but its late development leads to misinterpretations as to its probable cause, both by the family and friends and even by magistrates. The war acts in the French nomenclature as an _agent revélateur_ or as an _agent accélérateur_. Although its cause is prior and exterior to the war, general paresis in a majority of cases is brought out (_revélé_) by the lack of adaptability of the general paretic to the novelty and difficulties of his surroundings and duties in war. Trauma, strain, and alcohol in a certain number of cases accelerate the progress of a general paresis. The aggravation of paresis is produced by these same factors, but especially by violent cerebral trauma. According to Dupré, the Val-de-Grace statistics show that the number of paretics has not been increased by the war. Medicolegally, the victim of general paresis, like the victim of traumatic or infectious chronic mental disorder, may be assigned an incapacity of from 50 to 100%, and these patients are invalided under _Réforme No. 1_,—a permanent invaliding. Lépine of Lyons also discusses the compensation question in general paresis. Lépine thinks that, although syphilis is indispensable in paresis, yet the truth is that syphilis plus something else unknown to us is responsible for general paresis. This something else is neither a special kind of virus nor is it a particular kind of prepared soil alone. Trauma, physical, intellectual, and moral strain, and insomnia are the factors to which he calls special attention as adjuncts in the production of general paresis. As to the responsibility of the State for the production of general paresis, according to Lépine, the maximal responsibility should be 40% on account of the very considerable predisposition to paresis created by pre-existent syphilis.