1. J. P. Hsu:Nuovo Cimento B,88, 140 (1985);S. B. Ai andJ. P. Hsu:Found. Phys.,45, 151 (1985).
2. P. A. M. Dirac: inMathematical Foundations of Quantum Theory (Academic Press, New York, N. Y., 1978), p. 1.
3. J. P. Hsu:Nuovo Cimento B,74, 67 (1983);61, 249 (1981);78, 85 (1983);80, 201 (1984);89, 30 (1985);Phys. Lett. A,97, 137 (1983). See also Natural Editorial:Nature (London),303, 129 (1983).
4. H. Poincarè:Rev. Metaphys. Morale,6, 1 (1989);A. Pais:Subtle is the Lord (Oxford University Press, Oxford, 1982), p. 127.
5. For an interesting discussion of these events, seeP. A. M. Dirac: in:The Physicst's Conception of Nature, edited byJ. Mehra (Reidel, Boston, Mass., 1973), p. 12. For recent detections of fractional charge, seeG. S. LaRue, J. P. Phillips andW. M. Fairbank:Phys. Rev. Lett.,46, 967 (1981);J. P. Hsu:Phys. Rev. D,24, 802 (1981).