108 CULTIVATION. 



a period to allow the full development of the 

 flowers, and necessary enlargement of the tuber; 

 the sudden arrival of our summer checks the 

 growth and hastens on a premature torpidity. 



I am, therefore, decidedly of opinion, as well 

 from the nature of the anemone itself as from 

 the concurring" testimony of many successful 

 growers, that the middle of October is the proper 

 time for planting. The hazards of the winter 

 must be guarded against with the requisite 

 attention, by defending the bed from severe 

 frost, without depriving it of a full portion of 

 air. How this may be done requires only a 

 few words. 



Few persons, acquainted with the effects of 

 frost on vegetation, but are aware that cold air 

 descends perpendicularly, or, as it is explained 

 by some meteorological writers, heat is radiated 

 from the earth vertically. Heat, a positive, and 

 cold, a negative quality, do not, from their 

 effects, appear to be much diffused laterally. A 

 coping on a wall defends the fi'uit-trees under 

 it: a thin mat will repel frost that, without its 



