*This is the first of the series to be published in successive issues of the Angle Orthodontist: II. Changes in the Rat Molar following Hypophysectomy; III. Effects of Replacement Therapy on the Erruption and Histological Changes of the Teeth of Hypophysectomized Rats; IV. Dental Changes in a Hypopituitary Condition. A case report.

*Read before the Ninth Annual Meeting of the Edward H. Angle Society of Orthodontia, Chicago, October 17th, 1933.

*Read before the Ninth Annual Meeting of the Edward H. Angle Society of Orthodontia, Chicago, October 21st, 1933.

*Read before the Ninth Annual Meeting of the Edward H. Angle Society of Orthodontia, Chicago, October 18th, 1933.

*Read before the Orthodontia Section of the combined meeting of the American Dental Association and Chicago Dental Society, Chicago, August 11th, 1933.

*Questions bearing upon the theory or practice of orthodontia may be sent to the Question and Answer Department of the Angle Orthodontist, 184 Joralemon Street, Brooklyn, New York.