1. H. Aspden:Physics without Einstein (Southampton, 1969).
2. H. Aspden andD. M. Eagles:Phys. Lett.,41 A, 423 (1972).
3. E. R. Cohen andB. N. Taylor:J. Phys. Chem. Reference Data,2, 663 (1973).
4. M. Born:Einstein’s Theory of Relativity (New York, N. Y., 1965), p. 211.
5. An alternative way of viewing the quantumQ 0 is to regard it as equal to the energy contained within two lattice cells (one of each polarity) associated with the pressure of magnitudeP =e 2/4πb 4 required to keep lattice particles from disintegrating. Reasons are given in ref. (1) for thinking that such a pressure pervades all space.