( 36 ; 



the nature of the foil, through which they pafs, 

 and arc innocent, falutary, or noxious, in propor- 

 tion to the quantity, kind, or naixture, of the va- 

 rious ingredients, of which they are compoftd ; 

 and the confritution, of the perfon, who ufes 

 them : and fome of them are of great medicinal 

 efficacy. 



S T '^ G N A N T W A T E R. 



Stagnant water in ponds and ditches is gene- 

 rally efteemed the worft. But large lakes, which 

 are kept in alniofl a continual agitation by the 

 wind, do not properly come within the denomi- 

 nation of ftagnant waters. 



P U M P WATER, elpecially in 

 London, 



It appears from the analyijs performed by Dr. 

 Hcberden t> ^hat feveral pump waters in Lon- 

 don, v/hich he had examined^ and probably moft 



of 



t See Medical Tranfaft. vol. i. 



