See also pendulums for divination and dowsing. I had books on demonic possession, exorcism, palmistry, and dowsing. They publish "scholarly" articles promoting the reality of dowsing, neo-astrology, ESP, and psychokinesis. The motion of dowsing rods is now generally attributed to the ideomotor response. He argued that ideomotor effect could explain the phenomena of dowsing and table-turning. Coathangers can be used to make dowsing rods. The FBI has repeatedly issued alerts about dowsing rod devices being used as explosive detectors. An ancient box is discovered while digging a well discovered by Jessica while dowsing. This technique was later compared to dowsing by the site's detractors. He claimed that he will find the treasure through dowsing. He then describes dowsing with a forked twig although he rejects the method himself. These include tests of dowsing and pyramid power. He visits psychologist Chris French, who is performing a double-blind test of dowsing. Dowsing remains popular among believers in Forteana or radiesthesia. In 1979, Randi tested four people in Italy for dowsing ability.