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It does not smell strongly the way muddy patches on the shore 

 smell. It is pretty nice stuff, so I think that hydrogen sulphide 

 and other things that are produced there are very gradually re- 

 moved so it is all pretty well washed out. The water that is 

 coming down is anaerobic, apparently, and it is coming up an- 

 aerobic. It is a stream of anaerobic water washing away the 

 products of anaerobic decomposition. 



Is it a fertilizer ? Is the fresh water a fertilizer ? 



I don't know what nutrients there are. 



Ground waters would be rich. 



Yes, I suppose there would be a certain amount. 1 am not sure, 

 however, what that would be on Cape Cod. 



Is the diffusion of salt out of the surface waters an appreciable 

 factor that could enter in. This would be proportionable to the 

 difference in salt concentration rather than to the difference in 

 temperature and would drive the salt out of the surface waters 

 and I suppose down into the depths. 



Well, this calculation was based on the idea that the salt was 

 diffusing down by molecular diffusion, which can be measured. 



Is the temperature term appreciable in that? 



Oh, I suppose so. 



There did not seem to be a temperature term there and I pre- 

 sume the temperature is warmer at the surface. 



Well, half the year it's warmer, the other half it's colder. 



You just left that out. 



Well I left that out because it is the powers of 10 which will 

 show you whether there are large or small effects, and when I 

 have got that straight 1 don't worry too much about this number. 



Is it possible to put a tracer like flourescein on the water table 

 w^ith the rocks underneath and have it move over and up? 



Well, I suppose you could do that and come back in three years 

 and some of it ought to be up to the surface. Yes, that would 

 be perfectly feasible but, of course, you do not know whether 

 it is moving this way or whether it is moving that way. I mean 

 it might not come up in the hole you put it down. 



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