50 WATER-LILIES 



Especially in the early part of the season 

 there is liable to be an accumulation of scum 

 largely composed of algae. A determined 

 effort must be made to get rid of them. An 

 excellent way to accomplish this is, on a warm 

 day, to close all overflows and to allow the 

 water to rise four inches above the highest 

 outlet. Later this can be opened and all 

 algae will be carried off", especially if a garden 

 hose is called into requisition to clean out the 

 margins and all corners where any growth 

 may have lodged. This matter is further 

 discussed in Chapter xiii. 



During the summer little care is required 

 beyond the removal of dead leaves and an 

 occasional flushing, at which time the water 

 level, which may have fallen through evapora- 

 tion, must be reestablished. 



