 In 1900/01 his first phenomenological work was published in two volumes, titled Logical Investigations. The first volume contains a forceful attack against psychologism, whereas the (much larger) second volume consists of six “descriptive-psychological” and “epistemological” investigations into (I) expression and meaning, (II) universals, (III) the formal ontology of parts and wholes (mereology), (IV) the “syntactical” and mereological structure of meaning, (V) the nature and structure of intentionality as well as (VI) the interrelation of truth, intuition and cognition. Husserl now adheres to a version of platonism that he derived from ideas of Hermann Lotze and especially Bernard Bolzano, where he embeds platonism about meaning and mental content in a theory of intentional consciousness (see Beyer 1996).