ON THE INDIVIDUALITY 



time. Upon this, calculating the number of stems in one 

 acre of land, he concluded that five tons of liquid were ex- 

 haled daily, and that in a week they carried into the 

 atmosphere a sheet of water equal to their own superficies, 

 and one-third of an inch in thickness. 



(23.) Avoiding theories, I desire to impress upon my 

 readers in this chapter, that a root and a leaf are required 

 for the perfect potatoe plant, and that these two parts bear 

 important relation to each other, for the continuance of the 

 vital action between the sap and cells. 



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). 



(24.) THE potatoe plant which I have described is an 

 individual, propagating its individuality or peculiarity 

 from potatoe to potatoe, and which peculiarity cannot be 

 materially affected by external agents. If we propagate 

 one kind of potatoe for several years, it still remains the 



