514 



OjST useful and 



BOOK I. 



greens, should be planted, to counteract that tendency. Some 

 objects in landscape require to be relieved, and set off with 

 spirit ; others require to be kept under, or prevented from be- 

 coming principal. These, and a great number of other impor- 

 tant particulars, are effected by the colouring of trees and 

 shrubs. 



If we operate with the permanent dark and light greens, 

 as with light and shade in landscape painting, we may 

 produce many of the effects of aerial perspective. The imagi- 

 nary height of a hill may be increased, by placing dark co- 

 loured trees at the base and lighter kinds toward the summit: 

 so may the apparent breadth of a lake, by planting trees of a 

 dark green on the side nearest the eye, and others of a lighter 

 tinge on the opposite side : in the same manner, bays or re- 

 cesses may be apparently deepened, by placing the light-co- 

 loured greens on the prominences. This mode of operating 

 with the colours of trees will only be deemed unimportant by 

 the ignorant or unexperienced. 



Though the harmony of tints produces a pleasing scene, their 

 disagreement, on the other hand, may produce a striking effect*. 

 An outline, which cannot be varied in form, may be broken by 

 the opposition of its tints, or by masses of dark and light green. 

 Two or three trees together, that form a striking contrast with 



* Whately. 



