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Published online by Cambridge University Press: 28 July 2016
A great deal of interest has recently been taken in the subject of rocket propulsion, undoubtedly in the main due to the rather extravagant hopes, raised by Professor Goddard (I) in 1919, that a projectile might actually be sent into interplanetary space. Esnault-Pelterie (2) and Hermann Oberth (3) have more recently reaffirmed this possibility. Experiments by the late Max Valier, Reinhold Tilling, Darwin Lyon, Goddard himself and others have sustained the attention given to the matter. Prof. Richardson's article on jet propulsion (AERONAUTICAL JOURNAL, Jan., 1931) should be referred to. Mr. David Lasser's recent book (4) gives a fair general view of the subject, and the author's paper to the Society of Engineers (May 2nd, 1932) may also be of interest.