* This paper is a composite of addresses before the Twelfth Biennial Meeting of the Edward H. Angle Society of Orthodontia, October 13, 1939 and the Chicago Association of Orthodontists, September 30, 1940.
* Present as a preliminary report by the Eastern Component Group at the Twelfth Biennial Meeting of the Edward H. Angle Society of Orthodontia, October 8 to 14, 1939, Chicago.
*Presented as a preliminary report by the Eastern Component Group at the Twelfth Biennial Meeting of the Edward H. Angle Society of Orthodontia October 8 to 14, 1939 Chicago.
*Presented as a preliminary report by the Eastern Component Group at the Twelfth Biennial Meeting of the Edward H. Angle Society of Orthodontia, October 8 to 14, 1939, Chicago.