Philosophical Union of the University of California

• Issues and tendencies in contemporary philosophy
• Reason
• Causality
• Civilization
• Essays in metaphysics
• George Berkeley
• Philosophical concepts and practical results
• Possibility
• Programme for a study of Plato's "Republic"
• Psychology and philosophic method
• Reason. Lectures delivered before the Philosophical Union of the University of California, 1938
• Studies in the nature of facts