I worked for a fellow that dowsed, I didn't know what it was at the time.He told me to hang onto his hand and hold the forked stick with my other and we walked across the yard. When we came to water the stick turned and pointed down with such a force!! Another man I knew could dowse for water then tell you how far down you would have to drill and how many gallons per minute you would get. He could also do it just from a map of your area and could tell you if it was water or minerals too. Amazing gift.