xii CONTENTS 



CHAPTER PAGE 



XVIII. ADULTERATED AIR TOBACCO . . . .177 



XIX. THE LARGEST COMPONENT OF JACK'S HOUSE 



WATER .... .... 18o 



XX. OUR WONDERFUL RIVER OF LIFE AND MARVEL- 

 OUS TELEGRAPH SYSTEM THE BLOOD AND THE 



NERVES 203 



XXI. CLOTHING AS A PROTECTION TO JACK'S HOUSE . 209 



XXII. HOW TO PROTECT OUR EDGED TOOLS THE TEETH 221 



XXIII. THE EYES AND HOW TO PROTECT THEM . . 233 



XXIV. THE EARS AND HOW TO PROTECT THEM . . 262 

 XXV. REST AND SLEEP 276 



XXVI. HOW TO PROTECT JACK'S HOUSE WHAT TO DO 



IN EMERGENCIES 283 



XXVII. HOW TO PROTECT JACK'S HOUSE FROM CONTAGIOUS 



DISEASES CONSUMPTION 295 



XXVIII. THE SACREDNESS OF JACK'S HOUSE . . .311 



HELPS IN LESSON PREPARATION 315 



GLOSSARY 345 



INDEX , . 355 



