![Ether and the Theory of Relativity Image source: Julius Springer Ether and the Theory of Relativity Image source: Julius Springer](http://www.timeone.ca/wp-content/uploads/2013/03/Ether-and-the-Theory-of-Relativity-e1403877546592.jpg)
Classification: publication
Chapter: The Road to Reality
Ether and the Theory of Relativity is the English version of the title of a speech that Albert Einstein gave at the University of Leiden in 1920. It was subsequently published in the original German and later in an English translation.