X CONTENTS. 



CHAPTER PAGE 



XX. STUDY OF FRUITS AND SEEDS 238 



XXI. THE STUDY OF TREES 250 



XXII. ELEMENTARY STUDIES OF FERNS ... 272 



XXIII. PROCESSES OF DECAY 277 



XXIV. ELEMENTARY STUDIES OF SOME COMMON 



ROCKS 281 



XXV. THE SCHOOL GARDEN 288 



XXVI. SOME INSECTS OF" ECONOMIC IMPORTANCE ... 309 



XXVII. SUGGESTIONS FOR WEATHER STUDY 315 



XXVIII. SCHOOL EQUIPMENT AND ITS MANAGEMENT ... 327 



GLOSSARY , 339 



INDEX 31G 



