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on the Wasserkuppe, one of the Rhon Mountains in Western
Germany, are described in Willy Ley's Rockets, Missiles, and
Men in Space (New York: The Viking Press, 1968), pp. 419-
21.—Ed.
3. For information on this inventor see George R. Pitman,
Jr., ed., Inertial Guidance (New York: John Wiley & Sons,
1962), p. 10 ("Introduction," by John M. Slater) and p. 34
("V-2," by Dornberger).—Ed.
4. For a summary of the evolution of this aircraft, see
William Green, Famous Fighters of the Second World War
(Garden City, New York: Hanover House, 1960), pp. 124-28 —
Ed.
5. See note 2.
6. Dornberger, V-2 (see note 2), p. 245.—Ed.
7. For Professor Maximilian Schuler's classic paper on his
earth radius pendulum, see Pitman, op. cit. (note 3), pp. 443-
54: Appendix A, "The Disturbance of Pendulum and Gyroscopic
Apparatus by the Acceleration of Vertical," by Maximilian
Schuler, translated from the German by John M.
Slater; the article originally appeared in Physikalische Zeitschrift,
vol. 24, July 1923, pp. 334-50—Ed.
8. Charles S. Draper, Walter Wrigley, and John Hovorka,
Inertial Guidance, (New York: Pergamon Press, 1960), 130
pp.; and Sidney Lees, ed., Air Space and Instruments: Draper
Anniversary Volume (New York: McGraw-Hill, 1963), 516 pp.
—Ed.