 Reichenbach very briefly discusses the classical tests of the general theory of relativity: the red shift of light emitted from the sun, the bending of starlight passing near the limb of the sun, and the anomalous advance of the perihelion of Mercury. He summarizes: “…only the deflection of light and the red shift can furnish evidence for Einstein’s relation between gravitation and the real metric…” (p. 170). A far more enlightening analysis of the bearing of the classical tests had been given by Harold Jeffreys in 1919 and taken over (without acknowledgement) by Arthur Eddington in The Mathematical Theory of Relativity (Eddington, 1924); Jeffreys’s approach eventually led to the modern parameterization of metrical theories of gravitation. 