
Ethics
by Benedictus de Spinoza

In Sidelights on Relativity book, Einstein explains his theories of relativity. This was given in 1920 and discusses the concept of ether in space as it relates to relativity.
Listen to Sidelights on Relativity by Albert Einstein free online. The full audiobook (1 hr 4 min, 2 chapters, read by Paul Adams) streams free on this page.
Sidelights on Relativity (1921) is a public domain work.
| # | Chapter | Length | |
|---|---|---|---|
| 1 | Part 1 - Ether and the Theory of Relativity | 26:46 | |
| 2 | Part 2 - Geometry and Experience | 36:58 |
Prefer reading? Read Sidelights on Relativity online free or download the PDF and EPUB above.