Radio Shack sells a *small* DC motor for 2 bucks.  It's rated for 1.5-5
VDC, so you can run it off a single battery & suspend it over the top of
the glass of disilled water.  For a stirrer, I want something I can
attach to the tiny shaft w/ crazy glue.  Plastic may not stick; I have
some oak...  --Russ

On Fri, 01 Dec 2000 21:07:21 -0600 "Robert L. Berger"
<[email protected]> writes:
> Susan,
> 
> You are making CS but you are running the process too long. The 
> black that
> you see is normal for a system that is not under constant agitation.
> 
> This is typical of what happens when people do not understand the 
> process.
> To know what is going on you really should have a current meter in 
> one of
> the cell leads and stop the process when the current reaches about 4 
> to 5
> milliampers.
> 
> This black stuff is silver and the correct name for it is "treeing". 
>  It
> happens in most electroplating systems and that is   what making CS 
> is.
> 
> Do have a larer pointer to check for the tyndall effect? If not get 
> one.
> 
>  I know some people say it is very simple but they have been doing 
> it for
> years. So to cut the learning time get digital multimeter and learn 
> how to
> measure current with it. Then you can control the process.
> 
> "Ole Bob:
> 
> 
> 
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