1. «To see» is here used in the meaning of «to measure» by coincidences with local clocks. Therefore it does not mean «to see by a photographic camera». The difference is very strong as shown byJ. Teller:Phys. Rev.,116, 1041 (1941). For a more recent treatment see alsoG. D. Scott andM. R. Viner:Am. Journ. Phys.,33, 534 (1965). To eliminate ambiguities we will use «to measure» and «to see» with their own meanings.
2. See for exampleC. Møller:The Theory of Relativity, IV Ed., Sect.90 (Oxford, 1960), p. 240;H. Arzelies:Relativité generalisée: Gravitation, fasciculeI, Chap. XII, Sect.160 (Paris, 1961), p. 281;B. Kursunoglu:Proc. Cambridge Phil. Soc.,47, 117 (1951). See also ref. (5,8).
3. H. A. Lorentz:Nature,106, 795 (1917), Collected Papers,7, 171 (1934);A. A. Eddington:Mathematical Theory of Relativity, 2nd Ed. (Cambridge, 1924), p. 112.
4. Seyuan Shu:Critical Studies on the Theory of Relativity (Princeton, N.J., 1945).
5. G. L. Clark:Proc. Roy. Soc. Edinburgh,62 A, part IV, 434 (1947–48).