On the fourfold root of the principle of sufficient reason ; On vision and colours ; On will in nature / Arthur Schopenhauer ; translated and edited by David E. Cartwright, Edward E. Erdmann, and Christopher Janaway ; with an introduction by David E. Cartwright and Edward E. Erdmann.

Includes bibliographical references and index.

General editor's preface -- Editorial notes and references -- Introduction -- Notes on text and translation -- Chronology -- Bibliography -- Part I. On the Fourfold Root of the Principle of Sufficient Reason: Preface; 1. Introduction; 2. Survey of what is most important in previous teachings about the principle of sufficient reason; 3. Inadequacy of previous accounts and sketch of a new one; 4. On the first class of objects for the subject and the form of the principle of sufficient reason governing in it; 5. On the second class of objects for the subject and the form of the principle of sufficient reason governing in it; 6. On the third class of objects for the subject and the form of the principle of sufficient reason governing in it; 7. On the fourth class of objects for the subject and the form of the principle of sufficient reason governing in it; 8. General remarks and results; Variants in different editions; Collation of the two editions -- Part II. On Vision and Colours: Preface to the 2nd ed.; Introduction; 1. On vision; 2. On colours; Variants in different editions -- Part III. On Will in Nature: Preface, Introduction; Physiology and pathology; Comparative anatomy; Plant physiology; Physical astronomy; Linguistics; Animal magnetism and magic; Sinology; Reference to ethics; Conclusion; Variants in different editions -- Glossary of names -- Index.

"This volume of new translations unites three shorter works by Arthur Schopenhauer that expand on themes from his book The World as Will and Representation. In On the Fourfold Root he takes the principle of sufficient reason, which states that nothing is without a reason why it is, and shows how it covers different forms of explanation or ground that previous philosophers have tended to confuse. Schopenhauer regarded this study, which he first wrote as his doctoral dissertation, as an essential preliminary to The World as Will. On Will in Nature examines contemporary scientific findings in search of corroboration of his thesis that processes in nature are all a species of striving towards ends; and On Vision and Colours defends an anti-Newtonian account of colour perception influenced by Goethe's famous colour theory. This is the first English edition to provide extensive editorial notes on the different published versions of these works"-- Provided by publisher

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