CONTENTS 



CHAPTER p A<3B 



I. THE GREATEST TREASURE IN THE WORLD . . 1 



II. THE WONDERFUL HOUSE THAT JACK HAS . . 4 



III. How JACK'S WONDERFUL HOUSE BUILDS ITSELF . 6 



IV. FOODS AS BUILDING MATERIALS FOR JACK'S HOUSE 



THE PROTEIDS 8 



V. FOODS AS BUILDING MATERIALS FATS, CARBO- 

 HYDRATES, MINERALS . . . . .10 

 VI. How JACK'S HOUSE EXTRACTS ITS BUILDING MATE- 

 RIALS DIGESTION 16 



VII. How JACK'S HOUSE EXTRACTS BUILDING MATERIALS 



FROM FOOD STOMACH AND INTESTINAL DIGESTION 22 

 VIII. THE BUILDING MATERIALS OF JACK'S HOUSE 



MILK AND ITS PRODUCTS 32 



IX. OTHER ANIMAL FOODS 43 



X. VEGETABLE FOODS AS BODY-BUILDING MATERIALS . 54 

 XL BUILDING MATERIALS FOR JACK'S HOUSE BEVER- 

 AGES . 69 



XII. FOOD HABITS WISE AND OTHERWISE ... 86 



XIII. THE MOST NECESSARY BUT LEAST APPRECIATED 



MATERIAL USED IN JACK'S HOUSE PURE AIR . 97 



XIV. HOW TO HAVE THE BEST POSSIBLE VENTILATION . 118 

 XV. OTHER IMPORTANT FACTS ABOUT AIR . . . 135 



XVI. BREATHING HABITS 143 



XVII. How EXERCISE MAY IMPROVE JACK'S HOUSE . . 158 



xi 



