CHAPTER I.
THE NATURE OF ANIMAL LIFE.
PAGE The characteristics of animals 2 The relation of animals to food-stuffs 15 The relation of animals to the atmosphere 15 The relation of animals to energy 16
THE NATURE OF ANIMAL LIFE.
PAGE The characteristics of animals 2 The relation of animals to food-stuffs 15 The relation of animals to the atmosphere 15 The relation of animals to energy 16