THE WATER GARDEN 143 



at a little distance. It should enter the pool on the 

 bottom by means of an angle tile, the opening of 

 which should be level with the floor of the pool and 

 well cemented into place. This opening, a three or 

 four inch tile, can be closed by a wooden plug, also 

 cemented in, through which a one inch hole is bored 

 to be closed by an inch wooden rod extending above 

 the water. If a ten or twelve inch tile is placed above 

 this to keep back the soil it will be found that it 

 makes a more reliable stop than a plumber's trap, 

 which is always liable to leak and give trouble. The 

 swelling of the wooden rod hermetically seals the 

 opening and in fall, or whenever it is desired to let 

 out the water, it is easily removed by passing a chain 

 around it and lifting it with a lever and fulcrum, as a 

 crowbar and a block of wood. 



Water lilies are often troubled with the grey aphis 

 or plant lice; these are sure to appear in August if 

 the plants have been allowed to become crowded. 

 They are absolutely deadly, both on the Nymphsas 

 and the lotus. Nymphseas can be sprayed with kero- 

 sene emulsion to eradicate them, but kerosene must 

 never be used on the lotus, nor can it be used on pools 

 containing gold fish. For this reason the pads must 

 not be allowed to crowd until they stand out of water. 

 When the lice do appear the remedy is to spray with 

 water at a hundred and forty degrees for one thing, 

 and to get into the pool, either by wading or by means 



