I was talking to a co-worker today who expressed belief in dowsing. He said that he had personally experienced the force that caused dowsing rods to cross. He speculated this was caused by some kind of magnetism.
"From water?", I asked. "What would happen to dowsing rods if you walked next to a lake? Would they stick together really hard?"
He was puzzled by this. I then pointed out that some dowsers use a y-shaped branch instead of metal rods to dowse. Wood does not react to magnetic fields.
I got more puzzled looks from my co-worker. I told him to look up James Randi's dowsing tests and the ideomotor phenomenon. He said he would and also wanted to do his own test.
I told him if he wanted to make sure he wasn't unknowingly moving the dowsing rods, he should put them on a cart and then either push or pull it along. Bury some water in the ground, move the cart over it, and see if the rods move. If the rods only move when people are holding them, then it must be the people who are moving them.
I look forward to seeing a new skeptical outlook in my co-worker.
"From water?", I asked. "What would happen to dowsing rods if you walked next to a lake? Would they stick together really hard?"
He was puzzled by this. I then pointed out that some dowsers use a y-shaped branch instead of metal rods to dowse. Wood does not react to magnetic fields.
I got more puzzled looks from my co-worker. I told him to look up James Randi's dowsing tests and the ideomotor phenomenon. He said he would and also wanted to do his own test.
I told him if he wanted to make sure he wasn't unknowingly moving the dowsing rods, he should put them on a cart and then either push or pull it along. Bury some water in the ground, move the cart over it, and see if the rods move. If the rods only move when people are holding them, then it must be the people who are moving them.
I look forward to seeing a new skeptical outlook in my co-worker.