II. TO HJGHGATE. *<J 



agitation of its leaves, which are supported on 

 long foot-stalks, renders it cosy to be known. 



The leaves of the aspen-tree undergo a 

 constant tremulous motion ; and, during 

 their agitation, alternately present to the 

 eye their superior and inferior surfaces, the 

 former of which is of a bright dark-green 

 colour, while the latter is of a pure white. 



A field of corn, before it arrives at matu- 

 rity, is shaken by every gentle breeze, 

 though the transient undulations, thus pro- 

 duced, are scarcely audible: but, when the 

 ears become fully formed, and have acquired 

 awns, which Cicero styles the natural arma*' 

 ture or defence of the grain or corn against 

 the depredations of birds, the undulation 

 produces a sound readily perceptible to our 

 organs of hearing. When the heads of 

 the grain come into collision with each other, 

 the noise is much more audible. If ,we 

 remark that all vegetables are djiibrent 

 either in the form of their leaves, or with 

 respect to the insertion ; or by the foot- 

 stalks 



