Hi Matthias, There is a machine called The Rebuilder that is FDA approved as a TENS type of device, but it has silver laced socks (electrodes) that you wear and it is said to heal nerve damage. I have an article on nerve damage treatments on my site, and the CEO of that company commented that basically yes, there is some magic in the silver, and they did not explicitly state it in order to get it passed the FDA easily as a TENS unit. This is silver ionotophoresis. Seems to be exactly as you suggested might be useful.
There is a Japanese doctor who in the I believe 1980's got a nobel prize for his work with electrochemotherapy. This is sticking one electrode in the middle of a tumor and many others all around the perimeter of the tumor, then applying a current. It is used in Europe, but as of yet, is not done in the US. This is perhaps the same thing as you heard about in 1906. David
