Ether theory vs. source theory -- Disproof of the constant-velocity postulate -- The Einstein theory explained -- The transformation equations -- Contradictions in the theory -- The criteria of validity -- Some alleged confirmations -- Pertinent experiments -- A classical theory of relativity -- Why the theory persists -- Supplements: 1. Source theory vs. ether theory -- 2. Evidence of the spectroscope -- 3. Postulate not needed -- 4. Further contradictions in the theory -- 5. A device to illustrate the aberration of starlight -- Appendix: 1a. The principle of equivalence -- 2a. The concept of the spherical space -- 3a. Einstein's fourth dimension