Dieses Buch ist Reichenbachs Erkenntnistheorie, entstanden im Exil und 1938 in Englisch veroffentlicht.Es liegt hier erstmals in deutscher Sprache vor. Es enthalt den Schlussel zum Verstandnis der Reichenbachschen Philosophie und besticht durch die sehr geschlossene Darstellung der Gedanken uber den logischen Empirismus."

vii FOREWORD TO THE ENGLISH EDITION The lectures which I gave at the University of Chicago ix It is an unusual pleasure to present Professor Heisen- in the spring of 1929 afforded me the opportunity of re- berg's Chicago lectures on "The Physical Principles of viewing the fundamental principles of quantum theory. the Quantum Theory" to a wider audience than could Since the conclusive studies of Bohr in 1927 there have attend them when they were originally delivered. Pro- been no essential changes in these principles, and many fessor Heisenberg's leading place in the development of new...