io / CONTENTS 



CHAPTER PAGE 



XIX. THE HOME GARDEN 297 



XX. PLANT FRIENDS AND PLANT PESTS 314 



PART VI. DEVICES FOR LABOR SAVING AND 

 CONVENIENCE 



XXI. SOME SIMPLE MACHINES IN THE HOME . . . .331 

 XXII. How ELECTRICITY Is USED IN THE HOME . . . 344 



XXIII. How ELECTRICITY Is CONTROLLED IN THE HOME . . 359 



PART VII. RECREATION IN THE HOME 



XXIV. INDOOR RECREATION 371 



XXV. OUTDOOR RECREATION .390 



INDEX . . . . - 409 



