These three volumes contain the proceedings of technical conferences of the Army Signal School held at Fort Leavenworth, Kansas. A partial contents note is included with this description.

The comparative merits of two ways of carrying light wireless sets with field companies of the Signal Corps / Capt. George S. Gibbs -- Railroad, telegraph, telephone, and cable communication in and with Mexico / 1Lt I.F. Fravel -- The aeroplane as an aid to a field army / Capt. James Justice -- Notes on the operation of inductively coupled receiving sets in wireless telegraphy / 1Lt J.O. Mauborgne -- Military crytography / 1Lt Karl Truesdell -- Some experiences with pack transportation of machine guns with cavalry, as bearing on the transportation of wireless pack sets with cavalry / 1Lt Howard R. Smalley -- The use of motorcycles in a mobile army / 1Lt Ira F. Fravel -- Practical uses of the wave meter in wireless telegraphy / 1Lt J.O. Mauborgne -- Cavalry reconnaissance and transmission of information by modern methods / Capt. Holland Rubottom.