T H E C O L L E C T E D PA P E R S O F Albert Einstein V O L U M E 1 3 T H E B E R L I N Y E A R S : W R I T I N G S & C O R R E S P O N D E N C E J A N U A RY 1 9 2 2 – M A R C H 1 9 2 3 Diana Kormos Buchwald, József Illy, Ze’ev Rosenkranz, and Tilman Sauer E D I T O R S Jeroen van Dongen, Daniel Kennefick, A. J. Kox, Dennis Lehmkuhl, Osik Moses, and Issachar Unna A S S O C I A T E E D I T O R S Rudy Hirschmann, Jennifer Nollar James, Rosy Meiron, and Emily de Araujo E D I T O R I A L A S S I S T A N T S Princeton University Press 2012