30 LANDSCAPE-GARDENING 



has been discussed adequately by professors and 

 others interested in forestry, but more thought and 

 attention should be given to the part these areas of 

 woodland play in making the country attractive 

 and in providing healthful recreation. When this is 

 fully understood and appreciated, nothing will seem 

 more natural than to add to woods by planting trees 

 and shrubs along the margins of existing growth, 

 by preserving the young trees that start in the 

 interior of the forest and thus insure its perpetua- 

 tion, and by planting entirely new forests in those 

 regions not adapted to cultivation and the ordi- 

 nary forms of agriculture. 



The streams, once so clear and pure, have been 

 polluted until they are often to be avoided. They 

 have become muddy and loaded with sewage. 

 Formerly, their banks were sought as places of 

 residence, where now, in some cases, these banks 

 would be the last places selected for homes. 



To make the streams available as attractive 

 landscape features, to say nothing of their effect 

 on health, sewage and other impurities should be 

 kept out of them. Here the work of the physician, 

 sanitary engineer, forester and landscape-gardener 

 are closely related. 



