*From The Department of Orthodontia, The Cleft Palate Center and the Departments of Otolaryngology and Radiology: Chicago Professional Colleges, University of Illinois.
*This investigation was carried out under contract No. W-49-007 MD-496 with the Medical Research and Development Board, Office of the Surgeon General of the United States Army and by the Dental Protective Association of the United States.
*Thesis submitted as partial fulfillment of the requirements for the degree of Master of Science in Orthodontia in the Graduate College at the Chicago Professional Colleges of the University of Illinois, 1952.