[ 2 9 2 ] 



vers within their bounds by dykes, 

 and by cutting canals to let out the 

 waters, will greatly afnft the ope- 

 ration of vegetables, which would 

 be infufhcient to cleanfe the atmo- 

 fphere of low countries, without 

 this great caufe of corruption, ow- 

 ing to marines, being removed. 



EXPLA- 



