63 



" be presumed from the effects) still more 

 *' enriching." 



Mr. B., I believe, is the only person 

 who has attentively considered this sub- 

 ject, that will allow this scum, in any in- 

 stance, to be enriching to land. In every 

 example that I have seen, or heard of, it 

 has been found poisonous to the grass. If 

 scum were conducive to fertility in a float- 

 ed meadow, every flat or low part of the 

 beds, where the water runs slow, and 

 where the scum is generated in the great- 

 est abundance, would invariably be the 

 most fertile ; but this, experience tells us, 

 is never the case. This scum appears to 

 me to be a mere collection of small bub- 

 bles of simple water, which adheres to the 

 blades of the grass. Mr. Boswell should 

 1 2 make 



