First Edition, May, 1920
Second Edition, October, 1920
Copyright, 1920
BY
PREFACE
Einstein’s contributions to our ideas of time and space, and to our knowledge of the universe in general, are of so momentous a nature, that they easily take their place among the two or three greatest achievements of the twentieth century. This little book attempts to give, in popular form, an account of this work. As, however, Einstein’s work is so largely dependent upon the work of Newton and Newton’s successors, the first two chapters are devoted to the latter.