The foundations of Einstein's theory of gravitation

by Erwin Freundlich

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

NEW YORK
E. P. DUTTON AND COMPANY
PUBLISHERS