Sidelights on relativity / by Albert Einstein ... I. Ether and relativity. II. Geometry and experience, tr. by G.B. Jeffery, D. Sc., and W. Perrett, Ph. D. Einstein, Albert, 1879-1955. Jeffery, G. B. (George Barker), 1891- tr. Perrett, W., tr. Relativity (Physics) QC6 .E53 Microfilm 30075 QC 530.11 EIS Replace; LC copy replaced by preservation microfilm. DLC London : Methuen & co. ltd. ; c1922. c1922. 1922 Text 3 p.l., 3-56 p., 1 l. eng engger