CONTENTS. XIX 



CHAI^TER IX. 



HORTICULTURE. 



Sect. 1. Selection of seeds ^ propagation and improvement of races. 



I. Maturation of seed 350 



Causes of sterility 350 



II. Preservation of races or varieties 352 



III. Improvement of varieties and races 354 



Sect. 2. Propagaiion by eyes, cuttings^ grafting and budding. 



I. Propagation by eyes and buds 355 



II. " cuttings and slips 355 



III. " grafting and budding 356 



Operations of grafting. 



1. Whip grafting 357 



2. Crown grafting ........ 358 



3. Saddle grafting 358 



4. Budding — illustration of 359 



Sect. 3. Pruning, Training, Potting and Transplanting. 



I. Pruning — process, use and effects of 359 



II. Training — process and use of- 362 



III. Potting — process, conditions of 363 



IV. Transplanting— best method 363 



