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A TEXT-BOOK OF BOTANY. 



may be due in large part to the fact that it requires a limestone soil, 

 and in practice the most favorable results are obtained where there 

 is an underlying bed -of blue limestone. Sufficient has been said 

 to show that success will attend the cultivation of medicinal 

 plants, and indeed, by a priori reasoning on the basis of other 



erican Cannabis developed by F. A. Miller. Such forms are 

 :sult in strains that are better adapted to modern methods of 



agricultural efforts, one would expect that medicinal plants could 

 be grown with the same certainty of increasing the yields of any 

 particular constituent or quality that might be desired. Indeed, 

 the history of the sugar beet industry has been duplicated in the 

 work on Cinchona, and the same thing can be said with regard to 

 any other plant that man desires to conserve and cultivate. There 



