*From the Commission on Epidemiological Survey of the Board for the Investigation of Epidemic Diseases, Preventive Medicine Services, Office of the Surgeon General. The special studies on coccidioidomycosis have been conducted in the Department of Public Health and Preventive Medicine, Stanford University School of Medicine with the first five months of the study supported by a grant from the Rosenberg Foundation. The coöperative nature of the study was indicated in a previous paper10 in which appreciation was expressed to Dr. Francis G. Blake, Generals S. Bayne-Jones, and Charles R. Glenn; Colonels Bloyce A. Britton, J. R. Copenhaver, Robert E. Estill, M. G. Healy, A. L. Jennings, Neill Johnson, Russel V. Lee, Edward H. Padden, Albert Phillips, M. V. Prescott, John Roberts, Otis B. Schreuder, D. D. Todorovich; Lieutenant Colonels E. C. Donohoe, A. F. Dorner, Richard D. Evans, Ian B. Hamilton, J. Murray Kinsman, Harris D. Loe, Russell W. Mapes, P. M. Pederson, Benjamin Siebenthal, Roger E. Weismann; Majors Maurice P. Foley, Clarence J. Keefe, Edward J. Hall, Robert G. McCurdy, David L. Thurman, Harry E. Thompson, Harvey A. Woods; Chief Warrant Officer Melburn Biddulph; Lieutenants Wilburt M. Fitzpatrick, and George Schroeder; Master Sergeant Howard Sehlin; Sergeants C. O. Castledine, and Robert A. Kunde. In addition there were a very large number of others, Commandants, Ward Officers, Executive Officers, and commissioned and enlisted personnel, without whose whole-hearted coöperation these studies would have been impossible.