2^1 A TREATISE, &c. 



M'hcre the watcf is brackish. In uphmd situations, Avatcr 

 may be collect-ed into tanks in great abundance, during the 

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

 ceptacles, without incurring the cxpence of sheds or 

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

 or flat grounds, near the sea shore, v/here the soil is full 

 of vegetable and animal matter, or where the water is 

 brackish, a supply of water cr.n only be obtained^by the 

 assistance of the roofs above recommended. 



APPEN- 



