 Note:  The publication of the entire corpus of Schlick’s writings is appearing under the title Moritz Schlick Gesamtausgabe (Vienna: Springer), under the general editorship of Friedrich Stadler (Vienna) and Hans Jürgen Wendel (Rostock). The volumes which have appeared (Schlick 2006a, 2006b, 2008, 2009, and 2012) have already established new editorial standards for the eventual publication of the works of all the major figures of early Logical Positivism. At the same time, through the dedication of a small group of editors under the leadership of Stadler and Wendel, the Schlick collection is far more advanced than the collections of other early Positivists, which are also currently under way.