Editorial preface to the fourth edition and modified translation -- The text of the Philosophische Untersuchungen -- Philosophische untersuchungen = Philosophical investigations -- Philosophie der psychologie, ein fragment = Philosophy of psychology, a fragment.

v. 1. Preliminary studies for part II of the Philosophical investigations -- v. 2. The inner and the outer, 1949-1951.

Preface LUDWIG von Mises published many books and articles in his long and productive life, each of them making important contributions to the theory and ...