CONTENTS 
PART I.—PLANTS AT WORK 
CHAPTER PAGE 
I.—InrRoDUCTORY WORK: THE PURPOSE, ADJUSTMENT, APPARA- 
, TUS, AND USE OF THE LABORATORY . ‘ ‘ : . 8 
IL—THE PARTS OF A PLANT AND THEIR WORK . Fi 2 . 14 
III.—PLants AND THE LIGHT. é . : 2 : : . 20 
IV.—RELATION OF PLANTS TO WATER . é : F ‘ . 26 
V.—PROTECTION AGAINST HEAT, COLD, AND ANIMALS F . 29 
VI—SToRAGE OF FOOD MATERIALS ‘ ‘ ‘ : . 85 
VII.—DEPENDENT PLANTS , y - i 3 : r . 40 
VIII.—RrEpropuction : 3 A : . : ‘ ‘ . 46 
IX.—THE ORGANIZATION OF PLANTS INTO SOCIETIES . : . 56 
PART IITL—THE STRUCTURES OF PLANTS AS THEY 
HAVE DEVELOPED IN RELATION TO THE PROB- 
LEMS OF NUTRITION AND REPRODUCTION 
X.—Tue Arex . : ‘ : ‘ ‘i . E : . 65 
XI.—Funer . : F ‘ 3 a : i ‘ : . 17 
XII.—Bryopuytes . : ‘ ‘ 5 : F é . 82 
XIII.—PrreripoPpHyTEs z - . ‘ é : F : « 87 
XIV.—THE GYMNOSPERMS. . : : e ‘ : ; . 92 
XV.—THE ANGIOSPERMS . . Z . : Z : Zi - 96 
Rererence Lists . 7 : : : ; 7 . 103 
