This work traces the technical and historical development of lighter-than-air and heavier-than-air craft from early balloons and gliders through powered aeroplanes and rigid dirigibles, explaining basic principles of lift and flight, pilot training, and aerodynamic considerations. It surveys design advances, wartime adaptations, engine development, and growth of aircraft manufacturing and airmail services, and discusses operational topics such as navigation, types of flying, commercial uses, safety and regulation, and the emergence of transatlantic aviation. Illustrated chapters include production data and appendices summarizing aircraft and engine output and contemporary regulatory proposals.