Man used fire for over 10,000 years before we came up with the idea it was oxidation, but man probably sold wood to each other. Growing up in Maine that was about all I had to sell to make money in the Fall.
Stewart On Mon, Aug 12, 2013 at 11:02 AM, Jed Rothwell <[email protected]>wrote: > Daniel Rocha <[email protected]> wrote: > > You don't know under what conditions that was done. It may be not so >> simple. >> > > How complicated could it be? It cannot be difficult to prove there is a > magnetic field that persists for a few seconds or longer. If it is a > millisecond I agree it might be difficult. > > Magnetism is easy do demonstrate, no matter how complicated the cause of > it may be. > > - Jed > >
