7^" I \ THE MATHEMATICAL THEORY OF RELATIVITY \ CAMBRIDGE UNIVERSITY PRESS C. F. CLAY, Manager LONDON : FETTER LANE, E.C. 4 LNOENWDOYNO1R:36KH.Go:KwT.eHrLESEtWrMeIeAtS,CWAM.NCI.DLILCOA.,NLtCdO.., BOMBAY \ CMAALDCRUATSTA LMACMILLANANDCO.,Ltd. ) TORONTO. THE MACMILLAN CO. OF : CANADA, Ltd. TOKYO:MARUZKN-KABUSHIKI-KAISHA ALL RIGHTS RESERVED THE MATHEMATICAL THEORY OF RELATIVITY BY A. S. EDDINGTON, M.A., M.Sc, F.R.S. PLUMIAN PROFESSOR OF ASTRONOMY AND EXPERIMENTAL PHILOSOPHY IN THE UNIVERSITY OF CAMBRIDGE ira° CAMBRIDGE AT THE UNIVERSITY PRESS 1923 ac G E35 PRINTED IN GREAT BRITAIN