The First Magnetic Revolution

The first good use of loadstone was made by the Chinese over 2,000 years ago. Their application was geometry or Feng Shui and it was only about a thousand years later that people realized the effect with a suspended on needle or a floating fish could enable navigation far from land across the trackless ocean. It's amazing to think that Feng Shui predates navigation, isn't it? But what about the next intuitive leap, which is that magnetism and electricity are tightly bound together? How did that come to be? People for years and years were trying to pin down the link, but nobody succeeded until Hans Christian Ersted,. who loved to give public lectures in Denmark, was repeating