282 LUTHER BURBANK 



When this system is to be used on a lawn the 

 supports can be made more or less ornamental. 



The cost of irrigating lawns by this method is 

 far less than by the use of circular sprinklers, for 

 both time and water are saved and the lawn is 

 supplied with a more even distribution of 

 moisture. 



There is another plan of irrigation which is 

 known as the underground pipe or tile system. 

 This is not often used because the first cost is too 

 great. In some cases, however, it has proven to 

 be satisfactory. 



The part of any sprinkler system that deteri- 

 orates most rapidly is the rubber hose. When it 

 can be replaced by iron pipe it should always be 

 done to save expense. 



Where hose is used it is usually necessary to 

 purchase a new supply each season. Its first cost 

 is two or three times less than that of a galvan- 

 ized iron pipe, but the pipe usually lasts from 

 ten to twenty years. There are several other 

 systems of irrigation of lesser importance, but it 

 is not necessary to describe them here. 



THE MENACE OF WEEDS 



However well the soil may be prepared for 

 garden or lawn, and whatever the attention 

 given, cultivated plants of every description 



