On Sun, 9 Oct 2011 09:45:50 -0400, "Jim Wilkins"
wrote:


wrote in message
.. .
Can you guess what this is?

http://www.flickr.com/photos/2768312...in/photostream

Michael Koblic,
Campbell River, BC

A used plating or derusting electrode?


Close. It is an electro-etching copper cathode left out of solution
for 12 hours after using it on brass.

Michael Koblic,
Campbell River, BC