## Paul S. Epstein (1937)

**Textbook of Thermodynamics** by Paul Sophus Epstein, published by John Wiley & Sons, Inc., New York, and printed in the USA. This finely preserved copy is a 5th printing from March 1949.

Paul Sophus Epstein was a Russian-American mathematical physicist who played a significant role in the development of quantum mechanics. In 1921, while working as an assistant to Lorentz and Ehrenfest in Leiden, he was recruited by Robert Millikan (of charge-on-the-electron fame) to come to Caltech, where he remained for the rest of his career. More about Epstein can be read **here**.

In the preface to the book, Epstein writes *“This book treats thermodynamics from the point of view of the physicist and has a twofold purpose. One half of it is intended as a text in a basic course for seniors and younger graduate students. The other half may be used for reference or in special courses given to more advanced listeners.”*