I have the honour to present to this Association the compliments and good wishes on the American Association on Mental Deficiency, formerly the American Association for the Study of the Feeble-Minded. Permit me also to express the admiration of students in the field of mental deficiency in the United States for the long record of excellent work on this problem in England. We have appropriated much of your information; and your conclusions have strongly influenced our professional points of view. I wish also to express my personal appreciation for the privilege and honour of addressing this Association, and to acknowledge the courtesy of your President, Dr. Turner, for his kind invitation to attend this meeting. My presence here is the fulfilment of a long-standing desire to be more immediately familiar with your work on mental deficiency and allied problems. It is a distinct personal and professional satisfaction to meet your leaders in this field, and to observe your achievements at first hand.