On 06/16/2016 02:52 PM, John Popelish wrote:
>
> Do you know of any reference describing this effect?

Not handy, it's a memory from long ago when I used carbon electrodes at
a company.

-- 
Jerry Durand, Durand Interstellar, Inc.  http://interstellar.com
tel: +1 408 356-3886, USA toll free: 1 866 356-3886


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