Modern people, in spite of their scientific knowledge, often seem as as their ancestors. Astrology on-dollar business. Intelligent persons still believe that lines on their palm or the arrangement of t leaves in a cup predict the future. Airplanes not have a row of seats numbered 13, and buildings omit a thirteenth floor. Black cats, broken mirrors and spilled salt create fear and anxiety in many people. And ouija boards continue to be a popular pastime.