CONSERVATORIES 163 



both at the side and top, so as not to shut off too 

 much of the heat. I can recommend this plan with 

 the greater confidence because I have myself built and 

 planted such a wall in a greenliouse, and found it to 

 answer perfectly. In it were built pockets for Ferns 

 and Selaginellas, and the whole soon became a mass 

 of beautiful greenery ; the openings showing as fern- 

 shrouded caves of mystery. 



An ordinary galvanised tank with its regular 

 supply, for dipping, was sunk in the ground, its edge 

 being hidden by slabs of sandstone. Just above it 

 the rockwork rose rather more boldly, and from the 

 rain-water gutter outside a pipe was led through, and 

 passed under a concealing stone into a little rocky 

 channel, which brought in addition any rain water, 

 by one or two rough steps into the tank, pleasantly 

 splashing the neighbouring Ferns on the way. 



