PRACTICAL BOOK OF GARDEN ARCHITECTURE 



pergola extension, or open-air retreat, when it is not 

 desirable to have it enclosed. 



In Bermuda, where rain water must be depended 

 upon for drinking, the pure white tank houses and 

 the spacious expanse of white surfaces spread over 

 the hill sides form one of the most interesting 

 " sights" of this fascinating group of islands. Not 

 only are these charming houses and their roofs built 

 of the white coral rock of which the islands are 

 formed, but they are also whitewashed at very fre- 

 quent periods, to keep them free from dust and im- 

 purities, as the rain water collected from the roofs 

 of the houses furnishes a portion of the supply. In 

 addition to this any home or estate of good size has 

 its water-plant. Over a broad expanse of hilly gar- 

 den will be constructed a rocky or concrete surface, 

 kept immaculately white and clean, from which the 

 dashing rains of these tropical islands are collected 

 in great quantity. The white surface for collecting 

 the water, as well as the pipes from the house roofs, 

 all lead to big cisterns and water tanks. The rain 

 water, after undergoing a special system of addi- 

 tional purification in the cistern, is pumped up into 

 the tank or reservoir, from which it is piped to the 

 houses and farm buildings. Many of these high 

 tanks are built in tower and pyramid form, and 



from balconies reached by outside stairs the tourists 



no 



