CHAPTER XIV. THE SMELL, THE TASTE, AND THE TOUCH.
CHAPTER XVI. MORE ABOUT THE BONES.
CHAPTER XVIII. MORE ABOUT THE MUSCLES.
CHAPTER XIX. THE BRAIN AND NERVES IN ANIMALS.
CHAPTER XX. THE VARIETY OF MACHINERY IN ANIMALS.
CHAPTER XXII. WHAT ANIMALS USE FOR HANDS.
CHAPTER XXIII. THE TOOLS OF ANIMALS.
CHAPTER XXIV. MORE ABOUT THE TOOLS OF ANIMALS.
CHAPTER XXV. INSTRUMENTS OF DEFENSE AND ATTACK.
CHAPTER XXVII. COVERINGS OF ANIMALS.
CHAPTER XXVIII. BEAUTY OF THE COVERINGS OF ANIMALS.
CHAPTER XXIX. HOW MAN IS SUPERIOR TO ANIMALS.
CHAPTER XXX. THE THINKING OF ANIMALS.
CHAPTER XXXI. MORE ABOUT THE THINKING OF ANIMALS.
CHAPTER XXXII. WHAT SLEEP IS FOR.
PART III.—AIR, WATER, HEAT, LIGHT, &c.
CHAPTER III. FLYING AND SWIMMING.
CHAPTER IV. THE PRESSURE OF THE AIR.
CHAPTER XI. BALLOONS AND BUBBLES.
CHAPTER XII. MORE ABOUT BALLOONS.
CHAPTER XVI. WATER ALWAYS TRYING TO BE LEVEL.
CHAPTER XVII. THE PRESSURE OF WATER.
CHAPTER XVIII. ATTRACTION IN SOLIDS AND FLUIDS.
CHAPTER XIX. WATER IN THE AIR.
CHAPTER XXI. SNOW, FROST, AND ICE.
CHAPTER XXIII. THE DIFFUSION OF HEAT.
CHAPTER XXVIII. MORE ABOUT COLOR.