1 Table of Contents: “...’ world -- XI. On the validity of the law of causality -- Notes -- Bibliography of Philipp Frank -- Index...”

2 Table of Contents: “... A.Wells -- 28. U.C.L.A., 1951–53: Ruth Anna Putnam -- 29. Memories of Hans Reichenbach: Frank Leroi -- 30...”

3 “... of our contributors are frankly programmatic, showing how problems must be formulated afresh, how...”

4 “..., Philipp Frank. The proceedings were selected, edited, revised in the light of the discussions at our...”