CONTENTS 



CHAPTER PAQB 



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 

 XI. 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 



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