30 



answer the latter, but not the former pur- 

 pose, it will afford the same shelter to 

 land that river-water does, and though it 

 be apparently c\cy so clear, yet the grass 

 acting ujxjn it as a iuie sieve, will collect 

 from it some substantial manure ; but this 

 manure will not only be much less in 

 quantity, but very inferior in quality. 

 Were it practicable to float land with the 

 water that daily flows through London 

 Bridge, I am persuaded, that such use of 

 it, for only two weeks in a season, (one 

 week to be taken at the beginning, the 

 other at the end of winter) w ould render 

 tl>e land thus overflowed, more producti\ e 

 than a whole winter's regular watering, 

 with any the most favorable spring-water* 

 The quantity of mud collected from the 

 Thames water, even in this short space of 

 time, if it were made to flow with a pro})er 



degree 



