- Psychology from an Empirical Standpoint (International Library of Philosophy)
- The Origin of Our Knowledge of Right and Wrong: With a Biographical Note
- Sensory and noetic consciousness: Psychology from an empirical standpoint III (International library of philosophy and scientific method)
- Meine letzten W�nsche f�r Oesterreich
- Von der mannigfachen Bedeutung des Seienden nach Aristoteles