V. THE COAL FOODS (_Continued_) 40 Starches 40 Sugars 48 VI. THE COAL FOODS (_Continued_) 51 Animal Fats 51 Nuts 55 VII. KINDLING AND PAPER FOODS--FRUITS AND VEGETABLES 56 VIII. COOKING 62 IX. OUR DRINK 69 Filling the Boiler of the Body-Engine 69 Where our Drinking Water Comes from 72 Causes and Dangers of Polluted Water 75 Methods of Obtaining Pure Water 81 Home Methods of Purifying Water 87 X. BEVERAGES, ALCOHOL, AND TOBACCO 89 Alcohol 93 Tobacco 103 XI. THE HEART-PUMP AND ITS PIPE-LINE SYSTEM 108 The Blood Vessels 108 The Heart 115 XII. THE CARE OF THE HEART-PUMP AND ITS PIPE LINES 120 XIII. HOW AND WHY WE BREATHE 130 XIV. HOW TO KEEP THE LUNG-BELLOWS IN GOOD CONDITION 139 The Need of Pure Air 139 Colds, Consumption, and Pneumonia 152 How to Conquer Consumption 156 Pneumonia 165 XV. THE SKIN 167 Our Wonderful Coat 167 The Glands in the Skin 170 The Nails 172 The Blood-Mesh of the Skin 174 The Nerves in the Skin 177 XVI. HOW TO KEEP THE SKIN HEALTHY 179 Clothing 179 Baths and Bathing 184 Care of the Nails 188 Diseases and Disturbances of the Skin 189 XVII. THE PLUMBING AND SEWERING OF THE BODY 196 XVIII. THE MUSCLES 202