loo ROCK GARDENS 



be regulated. It is scarcely necessary to 

 mention that every trace of cement and all pipes 

 or taps should be hidden from view by either 

 soil, stones, or plants. When circumstances 

 will permit, it is advisable to have a constant 

 flow of water through these beds ; and although 

 this be but a mere dribble, say lo to 15 gallons 

 per diem, it will be sufficient to keep the water 

 from becoming sour or stagnant. 



If the supply pipe is arranged so that it 

 reaches the bottom of the bed, it will ensure 

 the water being constantly changed. 



If it is desired to make the bottom of the 

 bed of yellow clay, the same directions will 

 have to be followed, except that it will be 

 necessary to puddle in about 6 inches of 

 yellow clay instead of the concrete ; but 

 neither so water-tight nor lasting a result may 

 be expected. 



If it is wished to make a bog garden on a 

 scale larger than that just described, and the 

 water supply for it is limited, a concrete basin 

 should be made, following the directions already 

 given. Owing, however, to the expense and 

 the difficulty of getting the levels correct, it is 



