CONTENTS 



PAG* 



Preface iii 



Introduction 1-7 



Classification 7-10 



Early records and migrations of the common rats 10-15 



PART I 



ALBINO RAT MUS NORVEGICUS ALBINUS 



Chapter 1 Biology 19-28 



Chapter 2 Heredity 29 



Chapter 3 Anatomy 30-57 



Chapter 4 Physiology 58-62 



Chapter 5 Growth in total body weight according to age 63-72 



Chapter 6 Growth of parts or systems of the body in weight 73-85 



Chapter 7 Growth of parts and organs in relation to body length and 



in relation to age 86-175 



Chapter 8 Growth in terms of water and solids 176-179 



Chapter 9 Growth of chemical constituents 180-184 



Chapter 10 Pathology 185-186 



PART II 



NORWAY RAT MUS NORVEGICUS 



Chapter 11 Life history and distinguishing characters 189-194 



Chapter 12 Growth in weight of parts and systems of the body 195-197 



Chapter 13 Growth of organs in relation to body length 198-210 



Chapter 14 Growth in terms of water and solids 211-213 



Chapter 15 References to the literature 214-267 



Index.. . 269-278 



