Dear Andy;-
   There's a place on the Licking River where some of the "Button" bivalves can be found. Best time to look is around October after a decent draught. I've found well over a dozen species.
    Art
>
> From: Andy Rindsberg <[log in to unmask]>
> Date: 2004/02/18 Wed AM 10:14:34 EST
> To: [log in to unmask]
> Subject: Re: Marisa and ramshorns
>
> Dear Andy and Blue;-
> > (Is Blue your real name?)
>   I once read that the waters of the Ohio river, from the time they leave
> Pittsburg, to the time they reach the Gulf, have been used over 19 times by
> drinking, washing, flushing, and lawn watering. Does that sound right?
>    Art
>
> Sounds likely. Of course, the major uses of water are not very dirty. A
> great deal is used for irrigation and for cooling industrial processes, for
> instance. And it's good to remember that a water molecule is not dirtied by
> any of the uses that it is put to.
>
> In the late nineteenth century, landfills were often placed along riverbanks
> and lakeshores, or trash was simply dumped into the water. This in addition
> to sewage and discharge from industry. Populations of mollusks (and their
> fish hosts) plummeted in many watercourses, and riverview apartments were
> not popular.
>
> Today, it's hard to believe that American rivers once supported a thriving
> pearl-button industry as well as fisheries. All these things were present
> not so very long ago -- you can still read about them in old magazines.
>
> Have you ever tried photographing a scene from the same vantage point as an
> old picture? It's called 'rephotography' and it can be fascinating. To the
> teachers out there, who are looking for children's projects: I'd recommend
> starting out with a picture that includes an easily recognized landmark such
> as a bridge.
>
> Andrew K. Rindsberg
> Geological Survey of Alabama
>

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