4 CONTENTS 



EXERCISE PAGE 



XXII. STUDY OF A STREAM AND ITS VALLEY 30 



XXIII. THE WATER SUPPLY OF A CITY OR TOWN 31 



XXIV. THE WHEAT SEEDLING ........ 32 



XXV. STUDY OF THE ROOTS OF A PLANT 33 



XXVI. STUDY OF THE STEM AND LEAVES OF A PLANT .... 34 



XXVII. ONE FUNCTION OF LEAVES 35 



XXVIII. TEST FOR FOOD MATERIAL IN SEEDS 36 



XXIX. STUDY OF A FLOWER . .... . 37 



XXX. STUDY OF A SEED ..... 38 



XXXI. STUDY OF A FISH 40 



