CONTENTS 



CHAP. fAGE 



1. THE HISTORY OF THE INVESTIGATION .... I 



2. THE THREE CONDITIONS OF THE SEED . . . . l8 

 Xg. THE IMPERMEABILITY OF SEEDS AND ITS SIGNIFICANCE . 56 • 



4. PERMEABLE AND IMPERMEABLE SEEDS .... 69 



5. THE GROUPING OF SEEDS ACCORDING TO THEIR PERMEA- 



BILITY OR IMPERMEABILITY ..... 90 



6. ADDITIONAL EVIDENCE ON THE CONTRAST IN BEHAVIOUR 



BETWEEN PERMEABLE AND IMPERMEABLE SEEDS . II4 



7. HYGROSCOPICITY ........ I47 



8. A LAST WORD ON THE HYGROSCOPICITY OF SEEDS . . 180 



THE REGIME OF THE SHRINKING AND SWELLING SEED . 187 



THE FATE OF SEEDS AS INDICATED BY THE BALANCE . 225 



A CLUE TO THE HOMOLOGIES OF FRUITS . . . 24I 



THE HOMOLOGIES OF FRUITS AS REVEALED IN THE DRYING 



PROCESS ......... 258 



THE DEHISCENCE OF FRUITS . . . . . .273 



THE PROPORTION OF PARTS IN FRUITS . . . -293 



THE RELATION BETWEEN THE NUMBER OF SEEDS AND THE 



WEIGHT AND SIZE OF THE FRUIT .... 33O 



'i xi 



9- 

 10. 



II. 



12. 



14. 

 15- 



