| OLOF EDLUND Antiquarian Bookseller STOCKHOLM | ![]() |
| $ 40 |
| Fourth edition "with further appendix". The Stafford Littel lectures delivered in May 1921, originally published in 1922. For this fourth edition Dr. Einstein has added an appendix on his Generalised theory of gravitation. The text of the first edition was translated by Edwin Plimpton Adams,the first appendix by Ernst G. Strauss and the second appendix by Sonja Bargmann. |