American psychiatrists, led by Meyer, Hoch, Jelliffe, Kirby and others, have revived interest in the study of the development of various mental disorders, particularly dementia praecox, by definitely showing the great part which the personality of the individual plays in the development, progress and nature of a given psychosis. The major part of this work has been done in dementia praecox and manic depressive insanity, and conditions allied to these two abnormal mental reactions.
Recently I1 reported 144 cases of mental disease selected from a great number of cases which were observed at the Vanderbilt Clinic and were studied particularly with the idea of bringing out peculiarities of make-up. The results have confirmed the observations long ago made by the writers mentioned above. Further, however, it seemed interesting to note that in twenty-five cases of undoubted general paresis, those cases which were distinctly psychotic developed in persons with peculiar