The Theory of Space, Time and Gravitation

By V. Fock, translated by N. Kemmer London: Pergamon Press. Pp. xviii + 411. Price 100s. That Professor Fock's considered views on a subject to which he has himself contributed so much are now available in English is of great importance to all who are interested in the foundations of physics. This book has been put into excellent English by Professor Kemmer, who contributes a highly appreciative preface.