Doodlebugs and Dowsers

What lies beneath the ground? Our poor eyesight cannotpenetrate even an inch into the soil, so for centuries, fortune-seekers havetried every way imaginable to see below the surface. Whether searching formineral veins, groundwater, or buried treasure, people have looked for ways toavoid the plodding and backbreaking process of digging. They have followeddreams, seers, dowsing rods, and advice from the spirit world. When petroleumbecame an item of commerce, oil-hunters took to all these methods.