Invoice from General Electric to Ford Motor Company<p>Itemised as requested<p>Making chalk mark on generator $1.<p>Knowing where to make mark $9,999.<p><a href="http://www.smithsonianmag.com/history/charles-proteus-steinmetz-the-wizard-of-schenectady-51912022/?no-ist" rel="nofollow">http://www.smithsonianmag.com/history/charles-proteus-steinm...</a>