C N T E N T S . 



CHAPTER I. 



ON THE POTATOE PLANT. 



Parts of Potatoe plant (1); set (2); stalk (3). Under-ground 

 stem and tuber (5-7) ; roots (8) ; haulm (9) ; flowers and fruit 

 (10). Essential parts of plants (11, 12). Ultimate parts of pota- 

 toes (13-16). Origin of starch (17). Origin of nitrogen (18). 

 Motion of sap (19, 20). Experiments on Endosmosis (21). 

 Quantity of water imbibed by roots (22). Resume (23). 

 PAGE 1. 



CHAPTER II. 

 INDIVIDUALITY OF THE POTATOE PLANT. 



Individuality of the potatoe plant (24). Plurality of individuals 

 (25). Individuals are seedlings (26 29). Duration of indivi- 

 duals (30). Potatoe botanically considered (31). Gerard's de- 

 scription (32 34). Introduction of potatoe (35, 36). Wild 

 potatoes (37). Humboldt's account (38, 39). Meyer's account 

 (41). Don Jose Pavon (42). Caldcleugh (43 46), Chelsea 

 wild root (47 49). Uhde (50). Origin of our varieties (51). 

 Number of (52). Propagation of (53). Selection of (54). Ana- 

 logies of varieties (55, 56). Sweet potatoe (57 59). Origin of 

 name (60). Resume of the chapter (61). PAGE 6. 

 B 



