384 COMMON SENSE GARDENS 



down to your waterside in armies to breed, but the 

 spawn which is readily discerned floating on the 

 surface of the water may easily be removed with 

 a little scoop net made of fine gauze; and toads 

 should really be encouraged as they destroy millions 

 of undesirable insects. 



In Summer, except in very dry periods, the rain 

 will provide all the fresh water that is needed, and 

 rain-water is much better than water from the tap. 

 If the latter is supplied too freely in hot weather 

 a very undesirable water-plant that much resem- 

 bles noxious green scum will spring up quickly and 

 prove a nuisance. 



List of Water Lilies for Ponds, Tanks and Tubs: 



Nymphea pygmaea; Asiatic white Water Lily; 

 can be grown in a few inches of water; small, 

 not free blooming. 



N. Helvola; yellow; small; the best Water Lily 

 for a tub. 



N. alba candidissima; of the finest form; re- 

 quires a great deal of room and a depth of water 

 of five or six feet. 



