IN HIS presidential address at the annual meeting of the American Academy of Orthopaedic Surgeons, held in Chicago, on Jan. 27, 1953, Dr. Francis M. McKeever,1of Los Angeles, stressed the need for basic investigation in orthopedic surgery. He urged that the Committee for the Advancement of Orthopedic Surgery, instituted at the suggestion of the past Academy president, Dr. Guy Caldwell, of New Orleans, be charged with the responsibility for an early attack on the problems of stimulating basic research in orthopedic surgery. Dr. McKeever concurred in the idea that the Academy create a lay affiliate, composed of men representative of many segments of our population, for advice concerning ways in which orthopedic surgery as a specialty may best attain its objectives and serve the public. He envisaged such a group as a powerful stimulus toward furthering basic investigation. FEMORAL HEAD PROSTHESES At the same meeting Dr. Claude N.