Aviation Ignition - A Description of the Delco Generator Battery Ignition as Applied to Modern Aviation Engines. Dayton, Ohio, The Dayton Engineering Laboratory Company, 1918. 50pp, photo illus, hardcover. A celebration of WWI accomplishments, a memorial to participation in the development of the French Lorraine Dietrich, Hall-Scott and Packard engines, and an introduction to post-WWI production capabilities. A seldom seen volume with wonderful photo illustrations. Very good; front hinge weak.