This book is comprised of two papers written by Robert Goddard for the Smithsonian Institution: "A Method of Reaching Extreme Altitudes" and "Liquid Propellant Rocket Development." Two of the most significant publications in the history of rockets and jet propulsion, these reports appeared in 1919 and 1936, respectively. 96 black-and-white illustrations.

Unabridged republication of Rockets: "A Method of Reaching Extreme Altitudes" and "Liquid-Propellant Rocket Development," published by the American Rocket Society, New York, 1946.