56 SOIL, MANURES, SITU A TION, AND ENCLOSURES. 



servation and from winds; but as intruders scarcely ever at, 

 tempt to pass where they cannot look through, perhaps they 

 may yet be used as efficient barriers. The American Arbor- 

 Vitse is well adapted for this purpose, but like the buckthorn 

 it will not grow well in the shade ; hence when closely sheared 



Trimming Hedges. 



the interior branches are bare. Instead, therefore, of being 

 sheared in the common way it should be shortened back. 

 The close growth of a smoothly-shorn surface darkens and 

 kills the interior foliage as shown in Fig. 80. Fig. ?i repre- 

 sents the same shortened back, or rather thinned back, admit- 

 ting the light within. Fig. 82 shows 

 how this is done, the cut being made 

 at a fork b, or still shorter at a. 



9l r 83. Badly Pruned Hedge. 



FIG. 8 4 .-Badly 

 Pruned. 



a, 



FIG. 85. Proper 

 Pruning. 



The hemlock, although hardly stout enough for a hedge until 

 it has grown many years, forms one of the most perfect and 

 beautiful screens in existence, and it would prove a fine shelter 

 for trees against the wind. Its fresh deep-green color is un- 

 surpassed; and its denseness of growth in consequence of its 

 quality of growing in the shade is scarcely equalled. The 



