i8o 



. / (. -.V/Vv'. //.. /.SY. / ILL ( \\7'A',1 77:7?. 



keep the land satu- 

 rated as much as 

 possible. This sand- 

 basin thus treated 

 has never been abso- 

 lutely dry. Several 

 times the citizens 

 have been put on 

 short allowance till 

 rain fell and re- 

 plenished the reser- 

 voirs, but there has 

 always been enough 

 for the absolute 

 necessities of the 

 population. The 

 water, too, is of very 

 good quality, being 

 rain - water filtered 

 through sand, and 

 the advantage of its 

 being thus stored, 



instead of in an open reservoir, is that it is less subject to evaporation ; nor is 

 to any contaminating influence. Hut the fact that the water is hidden has been 

 puzzle to visitors. When asking to be shown the city water-supply, and 



D 



Z J 



o 

 < 

 s 



1 



b. 



a 



it exposed 

 a constant 

 on being 



