"black stuff"

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "davep by way of Terry Fritz <twftesla-at-qwest-dot-net>" <davep-at-quik-dot-com>

Tesla list wrote:

> Original poster: "Barton B. Anderson by way of Terry Fritz
<twftesla-at-qwest-dot-net>" <tesla123-at-pacbell-dot-net>

> Hi Ted -
 
> I assume you were using copper tubing as electrodes?
>  Yes, good point. Copper tubing can build up black areas of carbon.

	Carbon, or one of the copper oxides? (there are several, some
	of them are black...)  May not matter if carbon or oxide, might
	help with cleaning....

	best
	dwp