The foundations of Einstein's theory of gravitation

BY
ERWIN FREUNDLICH
DIRECTOR OF THE EINSTEIN TOWER
WITH A PREFACE BY
ALBERT EINSTEIN
TRANSLATED FROM THE FOURTH GERMAN EDITION, WITH TWO ESSAYS, BY
HENRY L. BROSE
CHRIST CHURCH, OXFORD
WITH AN INTRODUCTION BY
H. H. TURNER, D.Sc., F.R.S.
SAVILIAN PROFESSOR OF ASTRONOMY IN THE UNIVERSITY OF OXFORD
WITH FIVE DIAGRAMS