Considerable attention has recently been directed by several observers to adolescent insanity and dementia præcox, and an increase in the numbers of these varieties, especially of dementia præcox, has been stated to occur, which means an increase in the more hopeless and demented cases. Dr. Wood, for instance, at the Annual Meeting of the Medico-Psychological Association, remarked on the increase in the number of cases of mental breakdown during the age of puberty and adolescence among persons of the upper and middle classes— the ages of which on admission he placed at from eighteen to twenty-eight years—and he suggested as a cause the greater strain of education and the worries of life during the present time. Again, at a meeting of the Section of Psychological Medicine of the British Medical Association, Dr. Robert Jones mentioned an increase of dementia præcox and a general increase of the less curable forms of insanity.