Frontmatter -- CONTENTS -- ACKNOWLEDGEMENTS -- SYMBOLS AND ABBREVIATIONS -- REDUNDANCY RULES AND DEFINITIONS -- INVENTORY OF PROTO-GERMANIC (QUASI-) PHONEMES -- INVENTORY OF OLD ENGLISH (QUASI-) PHONEMES -- 1. INTRODUCTION -- 2. DIACHRONIC CHANGE -- 3. EXCURSUS ON METHODOLOGY -- THE DIACHRONIC RULES -- INPUT INDEX TO THE DIACHRONIC RULES -- WORD INDEX TO THE DIACHRONIC RULES -- BIBLIOGRAPHY -- CHART OF PRINCIPAL TRANSITIVE RELATIONSHIPS