On verso of title page : War Department. Document no. 1109. The Adjutant General's Office.

Part I. THE SIGNAL CORPS : Earlier history of the Signal Corps -- Organization of the Signal Corps immediately prior to the declaration of war -- Equipment possessed by signal troops, April, 1917 -- The war expansion of the Signal Corps and its tactical place in the new army -- Methods adopted to supply the increading demand for men -- Educating and training men in the Signal Corps -- Prefatory education of civilians subject to selective service -- Complete specialist organization for ear -- Classifications of material -- Trans-Atlantic communication -- Manufacture of wire -- Radio apparatus -- Field glasses and photographic cameras -- Miscellaneous equipment -- Difficulties and complications in production -- Reogranization in the Office of the Chief Signal Officer -- Separation of the land and air service -- Part II. THE AIR SERVICE : The origin of the Air Service -- The air service of the Mexican Punitive Expedition -- Condition of the air service on the eve of the declaration of war -- Aviation authorities and advisory boards -- Aviation programs -- Preliminary plans and estimates -- Plan for training planes -- The basic plan for service planes -- Army organization of the Air Service -- General plan for the creation of the Air Service -- Enlisting men for the Air Service -- Commissioning officers -- Providing for the troops -- Schools and methods of educating and training for aerial service -- Ground and flying schools -- Aerial gunnery -- Schools for nonflying officers -- Schools for enlisted mechanics -- Aeronautical engineering -- Primary training plane production -- Advanced training plane production -- The Liberty engine -- Service plane production -- Balloons -- Our overseas obligations -- Armament, instruments, and accessory equipment -- Control and difficulties of aircraft production -- APPENDIX : Explanation of abbreviations : Table A. Strength and stations of Signal Corps units, April, 1917 -- Table B. Signal units of the National Guard, by states, August 5, 1917 -- Table C. Organization chart, Office Chief Signal Officer -- Table D. Sources and original assignment of nuclei of signal battalions for divisions, corps, and armies -- Table E. Schools and colleges engaged in Signal Corps training -- Table F. Organization chart, Signal Corps -- Table G. Organization chart, Signal Corps, showing transfer of certain production activities to the Purchase, Storage and Traffic Division, General Staff -- Table H. Organization chart, division of Military Aeronautics -- Table I. Diagram showing stages of flying training, August 2, 1918 -- Table J. Air Service training schools as of October 23, 1918 -- Statement of works, documents, and persons consulted.