This unique bibliography offers a scholarly listing of Schiller materials, with mention in the preface of special works. An introductory essay discusses Schiller's pragmatic humanism and features a list of biographical references.

Philosophers investigating the nature of knowledge from Bacon and Descartes to logical empiricism, have sought to understand its character by means of the distinction between the content of knowledge, and the abstract logical and mathematical principles which regulate its structure or form. The nature of the distinction, the relative roles of content and form, and the relationships between the two, however, have been given widely divergent interpretations.