242 A TREATISE, & c . 



where the water is brackish. In upland situations, water 

 may be collected into tanks in great abundance, during the 

 rainy seasons, by leading the surface water into such re- 

 ceptacles, without incurring the expence of sheds or 

 hovels; but in fens, morasses, peat mosses, and marshes 

 or flat grounds, near the sea shore, where the soil is full 

 of vegetable and animal matter, or where the water is 

 brackish, a supply of water can only be obtained by the 

 assistance of the roofs above recommended* 



APPEND 



