Read at the annual meeting of physical society of Japan held at Tokyo University on May 2. 1949. Dirac particle, relativistic covariance.

Article on the statistical mechanical theory of irreversible processes.

Paper on the structure of the nucleon. Meson theory.

This paper deals with some probems in field theory.

Reflection on theory and experiment. Preparation for the 3rd Zurich talks.

Reflection on theory and experiment. Preparation for the 3rd Zurich talks.

Reflection on theory and experiment. Preparation for the 3rd Zurich talks.

Theory and experiment in sociology and history. Preparation for the 3rd Zurich talks.