CHAPTER XVI 



TUBS IN SMALL WATER OR BOG GARDENS 



Where there is not space enough for any approach to 



such a bog and water garden as I have attempted to 



sketch in the last chapter, a good deal may be done 



with small cemented tanks and channels, or even with 



petroleum casks sawn in half and sunk in the ground. 



The tubs can, of course, equally be kept above ground 



if it is preferred, but as I always like to consider all 



garden problems from their best-looking point of view, 



and as the use of the same plants would be advised 



whether the tubs were sunk or not, I will suppose 



that they are sunk so that they are not seen, their 



rims being an inch below ground. They will be so 



placed with regard to each other that they form such 



a chain as will be convenient for allowing the water, 



when it is turned on, to refresh the contents of each 



tub in succession, if it comes by gravitation. Therefore 



each tub, whether near its next neighbour or a little 



way distant from it, must be so placed that there is 



a continuous fall from the first tub to the last. 



If the water is from the mains of a company there 



should be one whole barrel at a higher elevation, with 



a tap near the bottom whose outlet is above the level 



of the highest of the sunk tubs. The water should be 

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