180 MUSTARD AND TURNIPS. 



with another, although it may be profuse in blossoms, since much 

 depends upon the state or condition of the air and soil, during its 

 period of bloom ; yet, it is also true that many plants blooming at the 

 same time require very different conditions of the atmosphere in order to 

 secrete the largest quantity of which they are capable, some require a 

 dry, others a humid, and many an intermediate condition. This is a 

 field for future examination and experiment. 



