1. C. O. Alley, Relativity and clocks, in “Proceedings, 33rd Annual Symposium on Frequency Control,” U. S. Army Electronics Research and Development Command, Fort Monmouth, N.J., pp 4–394 (1979). Copies available from Electronic Industries Association, 2001 Eye Street, N.W., Washington, D.C. 20006. This reference, a review talk given at the time of the Einstein Centennial is similar in approach to the present paper, but contains more detail on some aspects of the technique of the experiments and more biographical material on Einstein. The author’s chief collaborators in the planning and execution of the esqaeriments were Dr. Leonard Cutler of the Hewlett-Packard Company, and Dr. Gemot Winkler of the U. S. Naval Observatory. Two other physicists who contributed much to the experiments are former University of Maryland, graduate research students, Dr. Robert Reisse, now at the University of Arizona and Dr. Ralph Williams, now at the Texas Instruments Company. The work of another University of Maryland graduate student, Dr. John Degnan, now at the Goddard Space Flight Center, on the short pulse laser used in the measurements was very important. The local experiments were performed during the period May 1975 through January, 1976 at the Patuxent Naval Air Test Center in Maryland with the support of the U. S. Navy. The global experiments were performed during the period May through July, 1977 from the Andrews Air Force Base in the Maryland suburbs of Washington, D.C. and were jointly supported by the U.S. Air Force and Navy. Space does not permit the acknowledgment of the esential contributions made by the engineers and technicians at the University of Maryland, the Hewlett- Packard Co., and the U. S. Naval Observatory. These are listed in the reference cited above.
2. Banesh Hoffmann, “Albert Einstein, Creator and Rebel”, The Viking Press, New York (197 2). Paperback edition, New American Library, New York, London, and Scarborough, Ontario (1973). This is an excellent introduction to Einstein’s physics as well as a first-rate biography.
3. Hermann Bondi, “Relativity and Common Sense, A New Approach to Einstein,” Anchor Book Science Study Series, Doubleday and Company, Inc., Garden City, New York (1964). Reprinted by Dover Publications, Inc., New York (1980). The k-calculus is also discussed in another book by Bondi, “Assumption and Myth in Physical Theory,” Cambridge University Press (1967).
4. Hermann Minkowski, address to the 80th Assembly of German Natural Scientists and Physicians, Cologne, Germany, 21 September, 1908.
5. F. J. M. Farley, J. Bailey, and E. Picasso, Experimental verifications of the special theory of relativity,Nature, 217: 17 (1968).