Contents 



CHAPTER 



XVII. SEED-SCATTERING . . , , . 246 



XVIII. SEED-CARRIERS . . , , . , , 26 1 



XIX. CHANCES OF LIFE r . . . 277 



XX. FRIENDS AND FOES . , . .. . 300 



xxi. NATURE'S MILITIA . . . 313 



xxii. MAN'S WORK ON THE FARM 337 



INDEX . , , ^ , . , 361 



