REVIEW OF BOOKS ON SUBJECTS OF PROFESSIONAL INTEREST
"Military Observation Balloons." By Widmer. (D. Van Nostrand Company, 1917.)
This book, based on the Balloon Manual of the German Army, contains a detailed description of the kite and spherical captive balloons in use by the German Army just prior to the European war.
As is well known, observation balloons are employed in great numbers by the contending armies, and their importance and usefulness are unquestioned. As stated by the publishers, keen students of the present war believe that the struggle will be won in the air. However, it is doubtful if observation balloons are entitled to be considered in this connection. The supremacy of the air depends on the strength and effectiveness of the airplane forces, and observation balloons cannot be used at all, where the opposing side has a marked superiority in this respect.