There is no author's introduction to Phenomenology and the Foundations of the Sciences, either as published here in the first English translation or in the standard German edition, because its proper introduction is its companion volume General Introduction to Pure Phenomenology. 2 The latter is the first book of Edmund Husserl's larger work Ideas Toward a Pure Phenomenology and Phenomenological Philosophy, and is commonly referred to as Ideas I or Ideen 1. The former is commonly called Ideen III. Between these two parts of the whole stands a third Phenomeno- 3 logical Investigations of Constitution, generally known as Ideen II. In this introduction the Roman numeral designations will be used, as well as the abbreviation PFS for the translation at hand. In many translation projects there is an initial problem of establish- ing the text to be translated. That problem confronts translators of the books of Husserl's Ideas in different ways. The Ideas was written in 1912, during Husserl'